Upgraded Meteor and Metorite packages

Upgraded to Meteor 0.7.0.1 and upgraded Meteorite packages and fixed the
breakages it caused.

Still need to do something with the list and underline icons for the problem's
editing view.
Meteor 0.7.0.1 -> 0.7.1.2
Redesigned footer. No more iframes.
Adding folder for problem attachements
Revert "Adding folder for problem attachements"

This reverts commit 6152d7847c2775948bb724e0fc39054788c2920c.
Dependency version updates
'Knowit' -> 'Programming Ladder' in as brand in navigation bar
Merge branch 'master' of github.com:alexanbj/programming-ladder into attachments_to_problems
Using awesome-font instead of bootstrap glyphs
Deleting a problem now corrects the users' scores and solved count

This had stopped working somehow.
Added front page.

Uses the Bootstrap jumbotron in a slightly hacky way to display 3 medals with
the ladder top threes' scores and solved counts.
Minor change to wording on home page
Merge branch 'master' into attachments_to_problems

* master:
  Minor change to wording on home page
  Added front page.
  Deleting a problem now corrects the users' scores and solved count
  'Knowit' -> 'Programming Ladder' in as brand in navigation bar
Major rewrite and Meteor version update