Moved add prefix ($this->keyPrefix) to the key in function buildKey(). Could it be better?

Fixed an example of using buildKey in the doc

PHP supports exception stacks since 5.3 so we should use it.
Also Errorhandler is now able to display the stack: #297

make sure all information is displayed
Fixes comment by @creocoder issue #408
https://github.com/yiisoft/yii2/pull/408#issuecomment-18454179

git ignore composer.lock

[READY] jQuery UI autocomplete widget rework

[READY] jQuery UI DatePicker widget

New error/exception page implemented

[READY] jQuery UI widgets fixes 2

issue #131

issue #33
- implemted getScreenSize for linux systems
- tiny adjustments and better naming for console color methods
- color switch in base Controller changed to magic property
- colorized Help command

[READY] jQuery UI progressbar widget

Requirements

[READY] jQuery UI widget fixes