Added comments for potential read size error
Added game specific support to class GraphicsPatcher

* Includes Records
Reverted Exception error message in class MelSet

I think that is for the Record Header Size not the amount of bytes
found.
Enabled Graphics Patcher
Updated SoundPatcher Attrs
Added C.Encounter and C.LTemplate to CellImporter
Added GameSpecific Attrs for GraphicsPatcher in Skyrim.py
Updated MreEfsh

Added custom unpacker