Remove SCons
Clean up commented context code
MSAA Hint
Remove unused texture unit list
Initial MSAA, clean up outpass, remove extra newlines

MSAA currently does not work with HDR enabled. When MSAA is enabled, lighting does not work.

Outpass has been changed for code clarity and to use tgl_quad instead of hand-rolled code.

Several shaders have extra newlines that are now gone. light.frag has some extra stuff from me trying to get lighting working under MSAA.
Fix incorrect extension names and wrong sampler type
Stop chugging along when shaders fail to compile
Update README and change CRLF to LF
Fix lighting