Update files for WoW 6.0.2

Corrected problems produced by changed Loading / GUID / GetSpellInfo
behaviors
Additionals for last commit

- InfoFrame & RangeCheck Movable
- Changed SortOrder of some function definitions in VEM-Core to ensure
they exists when assigned to bossModPrototype
Changed mp3 usage to ogg

PlaySoundFile does not run custom .mp3 sind 6.0.2
Changed difficulty conditions
Merge pull request #29 from trueleader/master

VEM update for 6.0.2 (still MoP only)