Bunch of changes...

Summary:

* Switched from sinatra to jellyfish
* Removed eventmachine (it's actually disabled already)
* Restored polling (not sure if this would overwhelm server though, we could tweak)
* For server, use rainbows for non-jruby, trinidad for jruby
* Introduced ./bin/* to launch processes
* Removed shotgun and foreman (which needs extra processes)
* Removed god (seems not used anymore)
* Other codes cleanup

Example:

http://g0v.godfat.org/