Merge pull request #24 from tsapeta/0.2.x

merge 0.2.x (0.2.9 `Screamin Green`)
Merge pull request #26 from tsapeta/0.3.x

merge 0.3.x (0.3.0 `Ripe Strawberry`)
Merge pull request #27 from tsapeta/0.3.x

merge 0.3.x (0.3.1 `Dotted Mushroom`)
Merge pull request #29 from tsapeta/0.3.x

merge 0.3.x (0.3.2 `Brown Sugar`)
Merge pull request #30 from tsapeta/0.3.x

merge 0.3.x (0.3.3 `Alien Armpit`)
Merge pull request #31 from tsapeta/0.3.x

merge 0.3.x (0.3.4 `Flaming Volcano`)
Merge pull request #33 from tsapeta/0.4.x

merge 0.4.x (0.4.0 `Absolute Zero`)
Merge pull request #34 from tsapeta/0.4.x

merge 0.4.x into 0.5.x
[css] set .alert opacity to 0
[Alert] restore opacity:1
update Selector.js submodule
adaptation to the new version of Selector.js
[css] changes in navbar rules
[Selectable] added option to updating handler on select
[css] changes in .transition mixin
[css] changes in navbar
[css] small visual changes in default buttons
[css] less important fixes
[Selectable] fixed bright option
increased version to 0.4.1 `Tequila Sunrise`