Some minor fixes.

Fixes include:

Fallback in cache.py if CURRENT_VERSION_ID is not set.
Removed the STATIC_DIR context (as i said i would in last commit)
Add download attribute to top_song download.
Fix userprofile usage in musikk/views, add POST requirement to delete songs.
Add title tag to quote suggest button.
Change name from "tilbake" to "forsiden" in the admin page.