Change from Peter to fix vogleditor build warnings.
Update README.md
Use SDL for replay.
ktxtool now prints info from a KTX file's header.

Info includes:

- OpenGL "format"
- OpenGL "type"
- Image width
- Image height
- Image depth
- Number of mipmap levels
- Number of faces
- Array size
- For compressed images (not yet supported):
  - OpenGL internal format
  - OpenGL internal base format
  - Block dimensions
  - Bytes per block
Add check for mesa libGL to no-redirect block.
Merge branch 'UseSdlForReplay_03' of https://github.com/armyofzin/vogl into armyofzin-UseSdlForReplay_03
Disable clang documentation warnings due to SDL headers.
Remove unused m_wmDeleteMessage variable.
Merge branch 'armyofzin-UseSdlForReplay_03'