Move get involved section to home page only
Merge pull request #15 from ossreleasefeed/move-get-involved-to-home-tmpl-only

Move get involved section to home page only
asdf
Fix area filter labels and use MPTTModelAdmin.
Add login view to redirect to when user needs to log in.
Add 404 and 500 error views.
Add a pointer to the functional tests to the readme
Fixes #issue34, styling of feedback page