Update README.md
wrong roles for reviewninja mongodb user
fix wrong database name
Update installation.md
Update installation.md
avoid usage statistics question

it broke automation, when bower is being used for the first time on the system
remove bower install

it is automatically executed through postinstall of package.json
Update installation.md
improve default env variables and descriptions
improve installation guide
add procfile
Update installation.md
Update installation.md
Update installation.md
add nginx to installation guide
set variables to development default
respect 80 columns
avoid confusion with creating the callback url
fix typo
Added SESSION_SECRET documentation