Edited for release
Edited for release

Fleshed out some sections, added a few short paragraphs, and did a general language and spelling check.
MITI67/thebookofshaders,riibiax/thebookofshaders,riibiax/thebookofshaders,riibiax/thebookofshaders,MITI67/thebookofshaders,riibiax/thebookofshaders,MITI67/thebookofshaders,MITI67/thebookofshaders,MITI67/thebookofshaders,riibiax/thebookofshaders,riibiax/thebookofshaders,MITI67/thebookofshaders