Use my pygment theme as a component

https://github.com/MoOx/pygments-sass-base-theme
Add my 'slides' repo as a submodule
Don't fire 'configs' task each build

This make compass start with no cache each time... I don't like to
wait...
Responsive medias + Missing medias

- Responsive media using a wrapper to avoid reflow
- Missing media found on google image (shitty version but better than
nothing)
- Delete unused smaller medias version

Closes #7 #17