Converted rlgl module in header-only

This change allows rlgl.h usage as independent single-file header-only module... still some tweaks required, like removing GLAD dependency... required extensions could be manually loaded!

Also removed shader_distortion.h, embedded in rlgl.h
This commit is contained in:
Ray 2018-07-16 17:53:47 +02:00
commit 096fd6f2c3