* Add initial pomelo glsl work
* Fix ref to glsl_old
* Fix idents with numbers in lexer
* Use glsl_new for .vert in convert example
Controlled by PREFER_GLSL_NEW=1 env var
Also add simple test files
* Start making parser look like spec
* Port 'old' lex.rs to glsl_new
* Apply fixes after rebasing
* Fix clippy issue
* Fix PR comments
- Make into optional feature glsl-new
- Minor code style improvements
