breaking changes.

No changelog line since feature was introduced after beta

fixes #3252

also improved unit tests for querybuilder buildLikeCondition

Fixes #2906: Added support for using conditional comments for js and css files registered through asset bundles and Html helper

fixes #3118

`yii\console\controllers\AssetController::actionTemplate()` advanced to include `jsCompressor` and `cssCompressor` to the template.

Re-implemented RBAC by following more closely to the original NIST RBAC model. Dropped `yii\rbac\PhpManager`.

Improved action filter and action execution flow by supporting installing action filters at controller, module and application levels