Separate GUI from CHK/Broodwar APIs into 2 separate repos.

[sethmachine]

Create a separate repo/library that handles parsing the CHK format (and other data formats), rather than having a repo for both the GUI and CHK format handling.

This would be great because then any new project could simply pull the CHK library down (which looks very useful, thank you!!) rather than having to deal with the GUI parts and any other related artifacts.