Restructured web resources to better manage static files.
Some consistency improvements with URL overrides.
Added custom Evennia admin and ability to toggle it.
Added collectstatic to start/reload.
Admin interface greatly improved. Support for editing Attributes added.

Resolves #503. Resolves #201.
Minor cleanup in a readme and a method signature.
Fixed an issue where saving an attribute/tag would make duplicates.
Fixed placement of websocket javascript and template.

Fixed wrong readme in static.

Moved backends.py into web/util
Renamed static ev directory to evennia_general

Removed defunct news app.
Removed creation of admin media symlink. Fixed media handling.
Leftover news app cleanup, .gitignore updated.
Prevent editing of attributes which are not Python literals through the admin interface.