button: refactoring API
input: _disabled_yes -> _disabled, _only-icon_yes -> _only-icon
input: move mouseover/mouseout code to desktop level, add some tests
button: move desktop-only code to desktop.blocks
button: use jquery__pointer-events
button: refactoring API
button: refactoring
button: _disabled_yes -> _disabled
button: add tests for click
button: icon variants
Merge pull request #156 from bem/issues/122@v2

button: refactoring API
close #122