Merge pull request #19 from stellajkimm/heroku

Heroku
gemfile.lock
config.assets.initialize_on_precompile = false
Merge branch 'master' of https://github.com/stellajkimm/bookit_bucket
added rails_12factor and unicorn to gemfile
add .env to .gitignore
user unicorn via procfile
Merge branch 'master' of heroku.com:bookit-bucket into heroku
devise secret key