approve.html: added styles for HTMLDiff to make changes look clearer
base.html: added a margin at the bottom to prevent buttons disappearing
index.html: added a link temporarily to help with accessing the zone easier. Removing in final version.
sadwui.py:
- added cleaner function(todo),
- added docstrings,
- changed with open statements so that they would find files correctly. I don't like it though.
- added HtmlDiff instead of a textarea field, since it shows changes much better.