add deploy to heroku button's app.js
extend app.json with env variables
fix name to long for app.json validation

max 30 chars
add possibility for mongodb uri to be set by MONGOLAB_URI
remove host from app.json
add comment about the MONGOLAB_URI environment variable
only redirect to landing page if it is set
do not only redirect to landing page if in enterprise
add bower install to postinstall script
move bower from dev dependencies to dependencies
fix bower path
install bower before use
move bower install to postinstall in package.json
remove unused modules
add missing dependency
add host and protocol env variables to app.json
add heroku button to readme and descriptions to HOST and PROTOCOL
add more description to host
add further description regarding the github application
Merge pull request #322 from reviewninja/feature/deploy-to-heroku

add deploy to heroku button's app.js