[Unofficial] fix bugs and geo commands support version.

[charsyam]

I just merge some patches that I think clear.
for merging some patches easily.

so If you want geo commands and some bug fix version of twemproxy, try this.
https://github.com/charsyam/twemproxy/tree/tags/unofficial-0.4.1-cs1

this version just merged below issues.
1] Fix Bug: redis_auth don't work with redis_db
#458
2] Fix parsing bug when error body contains no spaces
#423
3] support nested multibulk reply
#395

• additional: geo commands support with this
  4] allow exists can variodic
  allow exists can variodic #388

If there are some bugs. I will fix it :)