Better printing of temporal memory connections

Fixes #1275 

@scottpurdy 

Goes from looking like:

	Segments: (format => {segment: [(source cell, permanence), ...])
	------------------------------------
	Column 0 / Cell 0:	{}
	Column 0 / Cell 1:	{}
	Column 0 / Cell 2:	{112: [[1122, 0.7], [1318, 0.7], [1124, 0.7], [1317, 0.7], [1126, 0.7], [1319, 0.7], [1320, 0.7], [1321, 0.7], [1322, 0.7], [1123, 0.7], [1316, 0.7], [1125, 0.7], [1120, 0.7], [1121, 0.7]]}
	Column 0 / Cell 3:	{}
	Column 0 / Cell 4:	{7: [[1134, 0.9999999999999999], [1135, 0.9999999999999999], [1136, 0.9999999999999999], [1137, 0.9999999999999999], [1138, 0.9999999999999999], [1139, 0.9999999999999999], [1140, 0.9999999999999999], [1302, 0.9999999999999999], [1303, 0.9999999999999999], [1304, 0.9999999999999999], [1305, 0.9999999999999999], [1306, 0.9999999999999999], [1307, 0.9999999999999999], [1308, 0.9999999999999999]]}
	Column 0 / Cell 5:	{}
	Column 0 / Cell 6:	{28: [[1295, 0.7999999999999999], [1296, 0.7999999999999999], [1297, 0.7999999999999999], [1298, 0.7999999999999999], [1299, 0.7999999999999999], [1300, 0.7999999999999999], [1301, 0.7999999999999999], [1142, 0.7999999999999999], [1143, 0.7999999999999999], [1144, 0.7999999999999999], [1145, 0.7999999999999999], [1146, 0.7999999999999999], [1147, 0.7999999999999999], [1141, 0.7999999999999999]]}
	Column 0 / Cell 7:	{77: [[1312, 0.7999999999999999], [1313, 0.7999999999999999], [1314, 0.7999999999999999], [1315, 0.7999999999999999], [1127, 0.7999999999999999], [1128, 0.7999999999999999], [1129, 0.7999999999999999], [1130, 0.7999999999999999], [1131, 0.7999999999999999], [1132, 0.7999999999999999], [1133, 0.7999999999999999], [1309, 0.7999999999999999], [1310, 0.7999999999999999], [1311, 0.7999999999999999]]}

	Column 1 / Cell 8:	{113: [[1120, 0.7], [1121, 0.7], [1122, 0.7], [1123, 0.7], [1124, 0.7], [1317, 0.7], [1126, 0.7], [1319, 0.7], [1320, 0.7], [1321, 0.7], [1322, 0.7], [1318, 0.7], [1316, 0.7], [1125, 0.7]]}
	Column 1 / Cell 9:	{}
	Column 1 / Cell 10:	{29: [[1297, 0.7999999999999999], [1298, 0.7999999999999999], [1299, 0.7999999999999999], [1300, 0.7999999999999999], [1301, 0.7999999999999999], [1142, 0.7999999999999999], [1143, 0.7999999999999999], [1144, 0.7999999999999999], [1145, 0.7999999999999999], [1146, 0.7999999999999999], [1147, 0.7999999999999999], [1141, 0.7999999999999999], [1295, 0.7999999999999999], [1296, 0.7999999999999999]]}
	Column 1 / Cell 11:	{}
	Column 1 / Cell 12:	{}
	Column 1 / Cell 13:	{}
	Column 1 / Cell 14:	{78: [[1129, 0.7999999999999999], [1130, 0.7999999999999999], [1131, 0.7999999999999999], [1132, 0.7999999999999999], [1133, 0.7999999999999999], [1309, 0.7999999999999999], [1310, 0.7999999999999999], [1311, 0.7999999999999999], [1312, 0.7999999999999999], [1313, 0.7999999999999999], [1314, 0.7999999999999999], [1315, 0.7999999999999999], [1127, 0.7999999999999999], [1128, 0.7999999999999999]]}
	Column 1 / Cell 15:	{8: [[1134, 0.9999999999999999], [1135, 0.9999999999999999], [1136, 0.9999999999999999], [1137, 0.9999999999999999], [1138, 0.9999999999999999], [1139, 0.9999999999999999], [1140, 0.9999999999999999], [1302, 0.9999999999999999], [1303, 0.9999999999999999], [1304, 0.9999999999999999], [1305, 0.9999999999999999], [1306, 0.9999999999999999], [1307, 0.9999999999999999], [1308, 0.9999999999999999]]}

	Column 2 / Cell 16:	{}
	Column 2 / Cell 17:	{114: [[1126, 0.7], [1319, 0.7], [1320, 0.7], [1321, 0.7], [1322, 0.7], [1124, 0.7], [1125, 0.7], [1317, 0.7], [1120, 0.7], [1121, 0.7], [1122, 0.7], [1123, 0.7], [1316, 0.7], [1318, 0.7]]}
	Column 2 / Cell 18:	{}
	Column 2 / Cell 19:	{}
	Column 2 / Cell 20:	{}
	Column 2 / Cell 21:	{30: [[1295, 0.7999999999999999], [1296, 0.7999999999999999], [1297, 0.7999999999999999], [1298, 0.7999999999999999], [1299, 0.7999999999999999], [1300, 0.7999999999999999], [1141, 0.7999999999999999], [1142, 0.7999999999999999], [1143, 0.7999999999999999], [1144, 0.7999999999999999], [1145, 0.7999999999999999], [1146, 0.7999999999999999], [1147, 0.7999999999999999], [1301, 0.7999999999999999]]}
	Column 2 / Cell 22:	{79: [[1312, 0.7999999999999999], [1313, 0.7999999999999999], [1314, 0.7999999999999999], [1315, 0.7999999999999999], [1127, 0.7999999999999999], [1128, 0.7999999999999999], [1129, 0.7999999999999999], [1130, 0.7999999999999999], [1131, 0.7999999999999999], [1132, 0.7999999999999999], [1133, 0.7999999999999999], [1309, 0.7999999999999999], [1310, 0.7999999999999999], [1311, 0.7999999999999999]]}
	Column 2 / Cell 23:	{9: [[1138, 0.9999999999999999], [1139, 0.9999999999999999], [1140, 0.9999999999999999], [1302, 0.9999999999999999], [1303, 0.9999999999999999], [1304, 0.9999999999999999], [1305, 0.9999999999999999], [1306, 0.9999999999999999], [1307, 0.9999999999999999], [1308, 0.9999999999999999], [1134, 0.9999999999999999], [1135, 0.9999999999999999], [1136, 0.9999999999999999], [1137, 0.9999999999999999]]}


To:

	Segments: (format => [[(source cell, permanence), ...], ...])
	------------------------------------
	Column 0 / Cell 0:	[]
	Column 0 / Cell 1:	[]
	Column 0 / Cell 2:	[[(1122, '0.70'), (1318, '0.70'), (1124, '0.70'), (1317, '0.70'), (1126, '0.70'), (1319, '0.70'), (1320, '0.70'), (1321, '0.70'), (1322, '0.70'), (1123, '0.70'), (1316, '0.70'), (1125, '0.70'), (1120, '0.70'), (1121, '0.70')]]
	Column 0 / Cell 3:	[]
	Column 0 / Cell 4:	[[(1134, '1.00'), (1135, '1.00'), (1136, '1.00'), (1137, '1.00'), (1138, '1.00'), (1139, '1.00'), (1140, '1.00'), (1302, '1.00'), (1303, '1.00'), (1304, '1.00'), (1305, '1.00'), (1306, '1.00'), (1307, '1.00'), (1308, '1.00')]]
	Column 0 / Cell 5:	[]
	Column 0 / Cell 6:	[[(1295, '0.80'), (1296, '0.80'), (1297, '0.80'), (1298, '0.80'), (1299, '0.80'), (1300, '0.80'), (1301, '0.80'), (1142, '0.80'), (1143, '0.80'), (1144, '0.80'), (1145, '0.80'), (1146, '0.80'), (1147, '0.80'), (1141, '0.80')]]
	Column 0 / Cell 7:	[[(1312, '0.80'), (1313, '0.80'), (1314, '0.80'), (1315, '0.80'), (1127, '0.80'), (1128, '0.80'), (1129, '0.80'), (1130, '0.80'), (1131, '0.80'), (1132, '0.80'), (1133, '0.80'), (1309, '0.80'), (1310, '0.80'), (1311, '0.80')]]

	Column 1 / Cell 8:	[[(1120, '0.70'), (1121, '0.70'), (1122, '0.70'), (1123, '0.70'), (1124, '0.70'), (1317, '0.70'), (1126, '0.70'), (1319, '0.70'), (1320, '0.70'), (1321, '0.70'), (1322, '0.70'), (1318, '0.70'), (1316, '0.70'), (1125, '0.70')]]
	Column 1 / Cell 9:	[]
	Column 1 / Cell 10:	[[(1297, '0.80'), (1298, '0.80'), (1299, '0.80'), (1300, '0.80'), (1301, '0.80'), (1142, '0.80'), (1143, '0.80'), (1144, '0.80'), (1145, '0.80'), (1146, '0.80'), (1147, '0.80'), (1141, '0.80'), (1295, '0.80'), (1296, '0.80')]]
	Column 1 / Cell 11:	[]
	Column 1 / Cell 12:	[]
	Column 1 / Cell 13:	[]
	Column 1 / Cell 14:	[[(1129, '0.80'), (1130, '0.80'), (1131, '0.80'), (1132, '0.80'), (1133, '0.80'), (1309, '0.80'), (1310, '0.80'), (1311, '0.80'), (1312, '0.80'), (1313, '0.80'), (1314, '0.80'), (1315, '0.80'), (1127, '0.80'), (1128, '0.80')]]
	Column 1 / Cell 15:	[[(1134, '1.00'), (1135, '1.00'), (1136, '1.00'), (1137, '1.00'), (1138, '1.00'), (1139, '1.00'), (1140, '1.00'), (1302, '1.00'), (1303, '1.00'), (1304, '1.00'), (1305, '1.00'), (1306, '1.00'), (1307, '1.00'), (1308, '1.00')]]

	Column 2 / Cell 16:	[]
	Column 2 / Cell 17:	[[(1126, '0.70'), (1319, '0.70'), (1320, '0.70'), (1321, '0.70'), (1322, '0.70'), (1124, '0.70'), (1125, '0.70'), (1317, '0.70'), (1120, '0.70'), (1121, '0.70'), (1122, '0.70'), (1123, '0.70'), (1316, '0.70'), (1318, '0.70')]]
	Column 2 / Cell 18:	[]
	Column 2 / Cell 19:	[]
	Column 2 / Cell 20:	[]
	Column 2 / Cell 21:	[[(1295, '0.80'), (1296, '0.80'), (1297, '0.80'), (1298, '0.80'), (1299, '0.80'), (1300, '0.80'), (1141, '0.80'), (1142, '0.80'), (1143, '0.80'), (1144, '0.80'), (1145, '0.80'), (1146, '0.80'), (1147, '0.80'), (1301, '0.80')]]
	Column 2 / Cell 22:	[[(1312, '0.80'), (1313, '0.80'), (1314, '0.80'), (1315, '0.80'), (1127, '0.80'), (1128, '0.80'), (1129, '0.80'), (1130, '0.80'), (1131, '0.80'), (1132, '0.80'), (1133, '0.80'), (1309, '0.80'), (1310, '0.80'), (1311, '0.80')]]
	Column 2 / Cell 23:	[[(1138, '1.00'), (1139, '1.00'), (1140, '1.00'), (1302, '1.00'), (1303, '1.00'), (1304, '1.00'), (1305, '1.00'), (1306, '1.00'), (1307, '1.00'), (1308, '1.00'), (1134, '1.00'), (1135, '1.00'), (1136, '1.00'), (1137, '1.00')]]