* Add `OnBeforeCreatureSelectLevel()` hook
- allows modules to alter the level of a creature just before it is set
* Fix missing class name.
* Hook should catch even if the level isn't being changed.
* Trim whitespace.
* Revert "Trim whitespace."
This reverts commit 76768d85c0b9878828b71a008e709c1df7ddadc5.
* Fix whitespace