sidebar behavior like a tree
Merge remote-tracking branch 'upstream/master'
Small refactoring and code cleaning
Small fixes
New component - ListView
Merge branch 'master' of https://github.com/vitmalina/w2ui

Conflicts:
	src/w2listview.js
fix w2listview
Merge branch 'master' of https://github.com/vitmalina/w2ui
Listview: Icons support, ctrl/shift key selection support, perfomance optimization
Documentation fix
Merge branch 'master' of https://github.com/vitmalina/w2ui
Merge branch 'master' of https://github.com/vitmalina/w2ui
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Images support; performance optimizations (especially for ie9)
Merge remote-tracking branch 'upstream/master'
Listview: some refactoring
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'