added flex add-on, updated utility, animation
Merge branch 'master' of github.com:uikit/uikit
Fixed animation reverse timing function
Merge branch 'master' of github.com:uikit/uikit
updated docs - added flex add-on to off-canvas navs
Merge branch 'master' of github.com:uikit/uikit
snippets regex: fixed matching empty lines. fixed class names place holder.
allow multiple connect container (switcher)
changelog updated
Removed search close button and loading spinner
Update docs regarding search close button
Merge branch 'master' of github.com:uikit/uikit
Refactored responsive tab behavior
Switch accross multiple connected containers (switcher)
Merge branch 'master' of github.com:uikit/uikit

Conflicts:
	CHANGELOG.md
changelog updated
changelog updated
switcher test updated
sticky updated
fixed: tab index in all empty elements, not just divs