Basic calendar export

What's missing:

 * Saving the generated .ical string to a file
 * Controller actions
 * Method on the model
 * Frontend stuff
Save the generated .ical file
Add #to_ical method on model
Add controller action
Add link to download the .ics file
Add event categories and text to exported file
Merge pull request #40 from BatchZero/ExportCalendars

Exporting .ical calendars
Use unencrypted DB credentials

These didn't need to be encrypted anyway
Testing pull request from fork
Try to fix database name
Add secret_token workaround for travis
Revert "Testing pull request from fork"

This reverts commit e4e49568802aefa55e11f0b73fbb68ec68be87de.
Merge pull request #51 from phansch/master

Testing pull request from fork

closes #50
Fix database
Add new env vars to travis config
Add fallback database name

This is probably required for external pull requests
Remove unused environment variables
library and folders
set up backbone structure - Header and main region
install bower and fullCalendar