fixed issue when count is 0
improved item-count.pl process termination
added new diagram
added file "couchbase-automatic-failover.png"
added file "2014-05-12_1419_test-replication_50000_1.dat"
added file "2014-05-12_1419_test-replication_50000_1.png"
added file "2014-05-12_1455_test-replication_50000_1.dat"
added file "2014-05-12_1455_test-replication_50000_1.png"
added file "2014-05-12_1515_test-replication_50000_1.dat"
added file "2014-05-12_1515_test-replication_50000_1.png"
added file "2014-05-12_1547_test-replication_10000_5.dat"
added file "2014-05-12_1547_test-replication_10000_5.png"
added file "2014-05-12_1602_test-replication_10000_5.dat"
added file "2014-05-12_1602_test-replication_10000_5.png"
added file "2014-05-12_1721_test-replication_50000_1.dat"
added file "2014-05-12_1721_test-replication_50000_1.png"