fixed typo
Merge pull request #9 from LouisDhauwe/master

fixed typo
07: don't track error_log_mysql + ignore it
Activate presentation 07
08: Update Twig download URL

(@ref http://blog.twig.sensiolabs.org/post/100399503693/twig-organization-on-github)
08: minor updates
Merge branch 'master' into gh-pages