[Bugfix] Confirmed / Unconfirmed events over time for conference dashboard
Implements OPTIONS http verb for root path
close #294
Removed conference_date_string_helper, moved date_string to application_controller

Deleted home_helper.rb
Remove therubyracer because of the following reasons:

* therubyracer is unstable between platforms, platform versions, ruby interpreters and even ruby versons.
  Pretty much everytime there's native extension compilation issue, it is therubyracer.
* therubyracer is officially discouraged by heroku as it uses lot of memory. On the other hand node.js advertises itself as very lightweight.
* using therubyracer on server is just like installing Node that can be used only by ruby apps (you're using v8 anyway)
* btw. node.js is necessary only on Windows and Ubuntu development, on Mac development ExecJS is using JavaScriptCore.

catched from https://github.com/sheerun/rails4-bootstrap/issues/18
Unused route for Conference#show
add volunteer fields to user
fix attachment_default migration
Adds email template and settings for conference dates updates
Conference date update email notification completed

Added tests
Adds migration for Conference Registration Dates to Email Settings
Adds email template and settings for conference registration dates updates

Added tests

Minor typo
Added test for email notification on conference dates and registration dates updates
Update schema, fixes #320
Move the footer further down to separate it more from the content
Fix the layout of the sign in box
Create default event_types. More event validations. Fixes #319
Make the spec aware of our new default event_types
Attempt to fix hoptoad
Load env on deploy
remove old model