gistfile1.txt

-----> Heroku receiving push
-----> Rails app detected
-----> Detected Rails is not set to serve static_assets
       Installing rails3_serve_static_assets... done
-----> Gemfile detected, running Bundler version 1.0.0
       Unresolved dependencies detected; Installing...
       You have modified your Gemfile in development but did not check
       the resulting snapshot (Gemfile.lock) into version control

       You have added to the Gemfile:
       * pg
       FAILED: http://docs.heroku.com/bundler
 !     Heroku push rejected, failed to install gems via Bundler

error: hooks/pre-receive exited with error code 1
To git@heroku.com:danielg.git
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'git@heroku.com:danielg.git'