tweaks html export
use character to make lectures available or not
tweaks TD titles + kozmetix + update html export
fix index file
Create gh-pages branch via GitHub
remove github automatic pages
adding new html pages
update index file
remove backup html file generated by emacs
move index to main directory

The basic idea is to move it in order to ease the generation of html
documentation through github pages
group git ignore rules into only one file
update gitignore
add clean target
Merge branch 'master' into gh-pages
cleaning
real clean
adding back some files
adding doc back
test
local fix