Fixed README.
Fixed README.

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