Fixes issue #457: incorrect HTTPS detection.
[WIP] RESTful routing syntax for UrlManager

issue #303
Here is the proposal for RESTful routing syntax:
https://gist.github.com/cebe/5674918
Fixes issue #460
Fixed doc.
Merge pull request #444 from tonydspaniard/366-bootstrap-buttons

[ready]added button group dropdowns
Merge pull request #392 from tonydspaniard/365-bootstrap-tabs

[ready]bootstrap tabs widget
refactoring button classes.
Merge branch 'master' of github.com:yiisoft/yii2
refactored ButtonDropdown and Dropdown.
refactored Tabs.
doc fix.
Savepoint: WIP implementing columns
Fixes issue #446: automatically scroll to first error.
better auto scrolling.
Savepoint, implementing fkeys.
Fixes issue #467: allow view file to be absent as long as the themed version exists.
\yii\widgets\Menu improvement
Merge pull request #469 from creocoder/menu-refactoring

\yii\widgets\Menu improvement
added missing default to getValue in boostrap tabs

fixes #465
Fixes issue #194: Added Application::catchAll.