bumped up ruby/rails version to 2.3.1/4.2 in README to match Gemfile
bumped up ruby/rails version to 2.3.1/4.2 in README to match Gemfile

catarse/catarse,sushant12/jvn,devton/catarse,sushant12/jvn,paulopatto/catarse,devton/catarse,sushant12/jvn,catarse/catarse,devton/catarse,sushant12/jvn,danielweinmann/catarse,catarse/catarse,paulopatto/catarse,paulopatto/catarse,paulopatto/catarse,catarse/catarse,devton/catarse,danielweinmann/catarse