Refactored the dependency on Skada to be replacable.

Refactored the dependency on Skada to be replacable.

* Changed to using a module-based approach for the parses. This means that it should be possible to support additional damage mods in the future, like Recount.
* Added a parse provider module for Skada, with much the same functionallity as was previously done in the main file.
* Changed from ending encounters after Skada's EndSegment to using the ENCOUNTER_END event. The ENCOUNTER_END should be reliable (the ENCOUNTER_START does seem to have issues still though).