Dreamfall Chapters: Prepare for another WIP release

- Remove broken shader directory
- Update TODO and README.md
- Disable coords.shader adjustment by default so light shafts on main
  menu will look right.
Dreamfall Chapters: Pass matrices into CollectShadows shaders as well
Add Unity shader headers for other games

These are just the headers that were also found in Dreamfall Chapters -
to get the rest I'll have to extract headers from each game's asset
files.

Also, I need to account for Unity automatically adding fog to shaders
which stops the checksums matching.