Changes

AuraSkills Compatibility (#447)

* AuraSkills Compatibility

* enum value and skill level validators

* conversion to MapTags

* extensions

* "valid" variable naming convention

* `auraskills_experience` tag and mechanism

* ``@example`s and shortened skill check

* meta clarification and player instance stored

* remove `asDouble` and `asInt` in mechanism error

* removed static method, stores experience amount to reduce needing to be grabbed repeatedly

* naming uniformity

* plugin.yml update

* map entries instead of every skill

* minor condition change

* minor changes
 (commit: dee5375)