jQuery UI DatePicker widget
Initial version of the new error/exception page.
Minor enhancements.
Renamed Purifier to HtmlPurifier.
Moved Smarty and Twig renderers into extensions
Reorganized Twig and Smarty dependencies
Removed "yii app" in favor of Composer application templates
jQuery UI progressbar widget
jQuery UI dialog widget
Merge pull request #394 from creocoder/jui-dialog

[READY] jQuery UI dialog widget
Merge branch 'master' of github.com:yiisoft/yii2

Conflicts:
	framework/composer.json
Removed Modal::body.
Updated the doc about view renderer.
Renamed apps/bootstrap to apps/basic.
Tests cleanup
- Better names
- Removed not used MySQLTestCase
- Moved base testcase for DB to db namespace
- Minor style fixes
Added advanced composer.json.
Merge branch 'master' of github.com:yiisoft/yii2
updated the guide doc.
Added missing doc.
New error page WIP.