Merge branch 'dev-ma'
Scaffolded tickets
Bootstrap3, select2
Merge branch 'dev-nd' into dev-ma
new/edit/show for tickets. Simple xlsx export

export to xlsx via tickets.xlsx. Some interesting filters by ids for
tickets/index
Working on mail reader
Simple mail reader is ready, added daemons and tasks
Added lang switcher and some Russian strings
Devise hooks added
Stashing changes
A bit changes to application layout
Fixed devise issues
Helpers refactoring
Tickets stuff added.
Merge branch 'ma'

Conflicts:
	app/views/devise/registrations/new.html.erb
Tickets index changes
Hoverable ticket's index
Fixed tickets index markup
More fixes to the tickets
Stashing changes