Stratum servers can now be named.
The names will be used throughout the display in the program, when not set "Pool 1" will
simply be used instead. The names are not exposed through API yet, it's on my TODO list.

Use "poolname" like this:

	{
		"poolname" : "Example pool",
		"url" : "stratum+tcp://example.com:8080",
		"user" : "y",
		"pass" : "x"
	},