Update forms.py

Edits to field labels and error messages.
Change Github and Django Logos
Merge remote-tracking branch 'upstream/master'
Update README.md
Updated 404 Page

Added Cat Image
Issue #194 | Admins can edit other admins' blog entries.
Rework Account Edit page

While fixing Issue #199, broke up the page, factored some text content
out of the site.
Merge pull request #197 from zbirmingham/master

Updated GitHub and Django/Python Logo
Merge pull request #198 from jfarbowitz/master

more text edits
Merge branch 'bugfixes'

Conflicts:
	vegancity/forms.py