[enh] create StudentSkill at student creation
[fix] studentskill.tested/acquired can be null
[enh] display StudentSkill instead of Skills
 on student page
[mod] update todo
[mod] small query optimisation
[enh] allow to put javascript at the end of a template
[mod] set the whole student detail view to be a angular app
[enh] set horribly badly made popover for modifying competence
[enh] extract popover content to real html, much cleaner
[enh] prepare popover html for real form
[mod] remove debug statements
[mod] add a TODO comment
[mod] forms needs csrf token
[enh] validate a skill \o/ (non recursivly first)
[enh] display a validated skill in green and orange for a to acquired
[enh] yay, function to unvalidate student skill \o/
[enh] yay, function to default student skill \o/
[enh] recursivly validate a skill \o/
[enh] recursivly unvalidate a skill \o/
[enh] yay, redirect to anchor to skills