Merge pull request #430 from ImperatorPrime/master

[SP] Removed g_headers files.
Merge pull request #431 from ImperatorPrime/master

Fix build break.
Adding myself as a maintainer.
Updated JK2 readme.
Make the readme more readable.
[SP] More renderer cleanup. Remove unused files (null, .def, .zip)
[SP] Fix bad merge referencing moved file
[MP] Fix Jedi Master getting stuck in zoom mode. Fixes #432
[SP] Fixed libraries not loading properly due to removing export definition file in previous commits
[SP] Fix missing project defines causing __NO_JK2 to never be set, resulting in crashes (and savegame incompatibility?)
[SP] Adjust CM_InlineModel error message
[MP] Adjust CM_InlineModel error message
Removed VS temp file.
Fixed build break caused rd-common changes.