Added information about --appconfig to output of help command, color option is now passed to controller whose help we're getting

Fixes #4592: Fixed `yii help` command was listing incorrect action names for methods like `actionSayNO`

Improved checks where substr_compare is used, replaced more substr + comapre cases with substr_compare

issue #746

issue #2852

adjust existing Console Controllers and docs

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