renamed exercise folders to match progression
Merge pull request #41 from gl-modules/rename-folders

renamed exercise folders to match progression
Fix live-reloading!

Closes #38
use consistent stanford-dragon number
General renaming/tweaks

* Redid the README to line up with other workshoppers
* Replaced instances of glslify-workshopper with shader-school
* Added screenshots to the README
adding point sprite exercise
Merge branch 'master' of github.com:gl-modules/shader-school
Merge branch 'master' into error-display