Add devise:views, bourbon setup, home controller

Devise views have been generated as-is and are in use for the User
model. These may be migrated to HAML/Slim depending on future design
choices. Confirmable is in place and can be seen using letter opener,
although not configured to number of days.

Neat now stores grid styles in seperate include and most bitters
elements seem to load without issue although alerts are having issues.
Not enough of a problem to warrant a change of framework by any means.
See: https://github.com/thoughtbot/bitters/issues/120

Home controller created to handle incoming requests.

.sass-cache/ now being ingored by git.