Update devise gem
Update sidekiq gem
Update newrelic_rpm gem
Update factory_girl_rails gem
Update mongoid-rspec gem
Update webmock gem
Updete bullet gem
Add auto_html to question & answer attributes

Fixes issues w/ question.media_file_url embedding.

Closes #381
Supports #245
Add tooltip for hashtags & links for question.body

Supports #381
Supports #245