Implemented features:
- knapp for random oppgave
- Riktig/Feil svar popup
- Published/Created dato på oppgaver - mkr
Merge branch 'mkr'

Conflicts:
	client/views/problems/problems.coffee
	server/populate_db.coffee
	server/publications.coffee
Added rules set and pulled out some static templates from the main template

The rules where shamelessly copied and modified from
http://www.ludd.ltu.se/w2/index.php/Programming_Ladder
Added proper 404 page
404 img src path now starts from root
Basic sanitize of submitted answer and correct answer before comparison
Correctly adjust the users' scores after deleting a problem

Uses mrt package collection-hooks
Added help text to solution field when adding new problems
Updated 404 style
Moved edit and delete problem buttons
Merge branch 'master' of https://github.com/markuskr/programming-ladder into markuskr-master

* 'master' of https://github.com/markuskr/programming-ladder:
  Implemented features: - knapp for random oppgave - Riktig/Feil svar popup - Published/Created dato på oppgaver - mkr

Conflicts:
	client/css/programming-ladder.less
	client/views/problems/problems.coffee
Moved current score placement
Merge remote-tracking branch 'upstream/master'
Moved new problem button to problems view. Minor changes to random problem button.