Merge pull request #1 from Astalaseven/master

Use static css file + s/informations/information/g
[enh] display errors for field comment_name
[enh] forbid comment content from being an empty string
[enh] display comment errors
[enh] display attendees on event administration page
Merge branch 'master' of https://github.com/Psycojoker/wanawana
Typos