rfc3339 date format resolved. local cache testing left.
multiple mods. cache tested.. one major flaw to fix.
massive changes to cache.js testing and linking pending.
caching tested. seems fine. cleaning up left
fixed a bug... cache crashes if user navigates before fully loaded.
Also added no of hits variable to keep track of most used files.
tweaked cache.js
fixed loading bar problems. added cache versioning
Merge branch 'file-cache'

Conflicts:
	files/static/js/drive.js
	files/templates/base/base.html