lecture06: Backups and Revision Control
http://xkcd.com/982/
http://docs.latexlab.org/docs
http://stackoverflow.com/questions/315911/git-for-beginners-the-definitive-practical-guide
http://sixrevisions.com/resources/git-tutorials-beginners/
http://starlink.jach.hawaii.edu/starlink/GitPrimer
http://wiki.kokuaviewer.org/wiki/Git_Primer
http://www.doblock.com/articles/a-git-primer-fit-for-linus-himself
http://software-carpentry.org/v5/novice/git/index.html
https://github.com/
https://help.github.com/categories/53/articles
https://help.github.com/categories/54/articles
https://help.github.com/
http://stackoverflow.com/questions/6188780/git-latex-workflow
https://www.sharelatex.com/blog/2012/10/16/collaborating-with-latex-and-git.html
https://help.github.com/categories/53/articles