Reorganizing folders
Review examples
Work on makefile and loader.html

raylib webpage has been completely reorganized and moved from gh-pages
(a pain to work with) to docs folder. Useless libs have been removed,
webs have been renamed, etc.

Now it would be easier (hopefully) to update webpage. :)

Examples have been renamed for coherence with raylib modules and test
examples have been merged into examples folder.

Replaced ex06b (incomplete) by a new useful one