update rails and other gems
update rails 4.2 configurations
change Devise to send email with ActiveJob
apply FlashResponder and LocationResponder for all controllers
remove flush messages from scaffold controller template
Merge pull request #23 from NCU-BRATS/rails-4.2

Rails 4.2
add sync gem and its dependancies
setup sync configurations
enable sync partials for project index
setup sync config for production
fix font-awesome
Merge pull request #26 from NCU-BRATS/fix-font-awesome

fix font-awesome
Merge pull request #27 from NCU-BRATS/sync

Sync
replace double quote with single quote
remove redundant commas
more readable condition judgement
Merge pull request #29 from NCU-BRATS/inspection-repair

Inspection repair
rename "profile" to "profiles"
rewrite profiles controller
Merge branch 'master' into profiles

Conflicts:
	Gemfile.lock
	app/views/layouts/_navbar.html.slim
rename user to users
adding users list at profiles index