advanced file excluding/including ported from git
improved comments, method visiblity and exceptions
refactored flag names
refactored params methods in Request

issue #2043
replaced usages of $_GET with Request::queryParams
typo
added information about request body to debug toolbar
removed unused use tag
more unit tests for helpers/FileHelper::findFiles using new wildcard exceptions matching
remove _FLAG from PATTERN_FLAG constants
updated helpers/BaseFileHelper::findFiles description and comments in messages/config.php
fixed code style for assignments inside if conditions
Merge branch 'request-params-refactoring' of github.com:cebe/yii2 into cebe-request-params-refactoring

Conflicts:
	framework/CHANGELOG.md
Merge branch '2048-improve-messages-config-exceptions' of github.com:nineinchnick/yii2 into nineinchnick-2048-improve-messages-config-exceptions

Conflicts:
	framework/messages/config.php
Fixed reference to old request API in docs
updated change log.
Merge branch 'master' of git://github.com/yiisoft/yii2