* monitor: link monitor to a static library

* monitor: remove unrelated code

* reporter: rename monitor to reporter

* report: rename library name

* use s2geometry's static library

* add geo library, support set/del/search_radial/distance APIs
* integrate the library into redis proxy

* redis_proxy: several bug fix & some refactor

1. fix the thread safety problem when socket is closed
2. when parse error, close the socket instead of abort
3. make the proxy_session & redis_parser's semantic more clear
4. make some rpc codes inline by declare it in source code

*: fix compile error of -Wuninitialized; add --compiler option for build; add --wait_healthy option for start_onebox; speed up build time; update rdsn (#83)