Added getting url and title, favicon from external link in posted context
Added temporarily 'Channel' MVC for 'Activity' and 'Interactions
' test
- Added "Interactions" Model and Controller, Views.
  - Preferentially, several actions and views created.
  - This MVC would be created continually.
- Added pane for showing title of all channels which was joined by current user.
  - A z-index of several columns was changed for rearrangment.
Merge branch 'master' of https://github.com/alistasha/all-about-post

Conflicts:
	app/models/user.rb
	config/routes.rb
	db/schema.rb