add calendar
move calendar to haml
generate calendar with backbone.js
first api for events
add calendar on events page
calendar design fix
add routes to js
change events api
del unused calendar backbone views
moving ajax from view to model
rename prepare_days
change year,month event's todo
Merge branch 'feature/event_calendar_42' into develop

Conflicts:
	Gemfile
	app/controllers/web/welcome_controller.rb
	app/models/event.rb
	app/views/web/welcome/index.html.haml