Updated the README for 0.2.2.
Updated the README for 0.2.2.

ngpestelos/chruby,ilikepi/chruby,regularfry/chruby,JeanMertz/chruby-fish,kbrock/chruby,ilikepi/chruby,eunomie/chgo,eunomie/chgo,rstacruz/chruby-fish,postmodern/chruby,regularfry/chruby,JeanMertz/chruby-fish,postmodern/chruby,kbrock/chruby,ngpestelos/chruby,rstacruz/chruby-fish