translate skriv to reSTructured to send doc to ReadTheDocs.org
remove build directories
Add all chapter index
improve migration script
improve migration script
update tip to hint
update english doc index
Migration from skriv to reST done \o/
fix en index
atoum does not start with a capital letter.

Even though it's the first word in the sentence, as the French documentation does not make it start with a capital letter, I've removed it.
Rephrased the introduction
Rephrased download & install introductory text
reorganize files
many fixes
Merge branch 'readthedocs' of github.com:atoum/atoum-documentation into readthedocs
Begin atoum theme
update en conf
rollback to default theme
remove skriv backup