Old code cleanup.

Rewrite (groups|skills|languages)/search.

Remove permission denied middleware.

Add trailing slashes.

Fix list_location url regexes.
[bug 846039] Implement 'Stronghold'.
[bug 846039] Return location listing page even when nonexistent country.
[fix bug 844162] Redirect only authenticated users to new profile pages.
Merge pull request #429 from glogiotatidis/stronghold

Stronghold