In case we rescue from a fatal error, we want the error and the backtrace to
the error logged, so we can debug later on. This change injects the configured
logger from the rails app to the grape API and logs error as well as backtrace
in a rails-like fashion.

This rescues all errors and returns a proper JSON response. Fixes #2833.

Fix #2790

remove incorrect information about the api version

The API version is currently not equal to the gitlab major version number. Gitlab 4.1 
still uses API version 3. Point to the lib/api.rb file instead which contains the
autoritative information.

Added swipe view for image diff

Prepared diff view for multiple view modes

Converted commits.js to coffeescript
image info in separate coffeescript file

Added swipe view mode

Added onion skin viewMode

Updates web hooks to process via queue

Feature: Projects page

Missing environment added to 'Try fixing it' block

fix edit project members access link and page fixes refs #2745

Add assign project to team button on team page