Support Sorted Set with LEX commands

* new commands : ZLEXCOUNT, ZRANGEBYLEX, ZREMRANGEBYLEX
** added commands to Jedis, ShardedJedis, JedisCluster, PipelineBase with Binary
/ Normal(String)
** description links
*** http://redis.io/commands/zlexcount
*** http://redis.io/commands/zrangebylex
*** http://redis.io/commands/zremrangebylex
** Unit test included
Remove unused (by accident?) import
Merge branch 'master' into support-sorted-set-with-lex

Conflicts:
	src/main/java/redis/clients/jedis/BinaryShardedJedis.java
	src/main/java/redis/clients/jedis/Jedis.java
	src/main/java/redis/clients/jedis/Protocol.java
	src/test/java/redis/clients/jedis/tests/commands/SortedSetCommandsTest.java
Merge branch 'support-sorted-set-with-lex' of github.com:HeartSaVioR/jedis into support-sorted-set-with-lex
Merge branch 'support-sorted-set-with-lex' of https://github.com/HeartSaVioR/jedis into HeartSaVioR-support-sorted-set-with-lex