-----> Heroku receiving push
-----> Ruby/Rails app detected
-----> Installing dependencies using Bundler version 1.1.pre.8
       Running: bundle install --without development:test --path vendor/bundle --deployment
       You are trying to install in deployment mode after changing
       your Gemfile. Run `bundle install` elsewhere and add the
       updated Gemfile.lock to version control.
       You have deleted from the Gemfile:
       * growl (= 1.0.3)
       * rb-fsevent (= 0.4.3.1)
 !
 !     Failed to install gems via Bundler.
 !
 !     Heroku push rejected, failed to compile Ruby/rails app