add: calendar draft
Merge branch 'develop' into jquery-calendar-widget
Add: base class for widgets using websocket
tweak: improve the class hierarchy of the stream widget
add: basic, not saved, event management (click to add)
update: externals
update externals
Merge branch 'develop' of https://github.com/capensis/canopsis into develop

Conflicts:
	sources/externals
add: editwindow, and tweak the calendar to be feed by the canopsis rest API
add: eventwindow for usual event daily view (empty at the moment)
add: event type calendar specification in eventstore
fix: item data check in form field cmetric (see #169)
edit: add ics2amqp connector handling to the slink tool
edit: add sources option in the calendar widget options
edit: add ics sources handling for the calendar widget
edit: make the event window show events
add: ics2amqp connector
fix: Check in Schedule controller when openning wizard
fix: Show legend and handle properly labels in cat bar graph
fix: Live reporting for widget Line Graph