Auto compaction was wrongly closed

check TCMALLOC_EXTENSION in pika.cc

Update README_CN.md

bugfix GEO (OpenAtomFoundation#77)

* Update hyperloglog test example

* Modify test

* bugfix geo && update test

code optimizing: don't return reference or pointer of member variable…

…s in pika_server

set timeout to 30s in trysync

2.1.2

1) move rpath to Makefile.global;

2) modify used_memory of InfoCmd to the sum of db_memtable and db_tablereader;

bugfix: rpush may not work after ltrim (1 -1)

Merge branch 'master' of https://github.com/Qihoo360/pika