Remove @Deprecated TransactionBlock and PipelineBlock

* remove all @Deprecated methods and classes about TransactionBlock and PipelineBlock
Remove Unit test related to @Deprecated TransactionBlock and
PipelineBlock

* missed a spot... removed
Create CONTRIBUTING.md to help newbie contributors
Fix typo, more description to CONTRIBUTING.md
Unify 'how to contribute' to CONTRIBUTING.md
Jedis unit tests works with 'latest' unstable branch
fix redirection's bug
Merge branch 'master' of https://github.com/yangzhe1991/jedis into yangzhe1991-master
Merge branch 'remove_deprecated_transactionblock_and_pipelineblock' of https://github.com/HeartSaVioR/jedis into HeartSaVioR-remove_deprecated_transactionblock_and_pipelineblock

Conflicts:
	src/main/java/redis/clients/jedis/BinaryJedis.java
	src/main/java/redis/clients/jedis/PipelineBlock.java
	src/main/java/redis/clients/jedis/TransactionBlock.java
Merge remote-tracking branch 'upstream/master'