Discussion flavor tasks

- Add a home page
- Remove unused pages
- Configure the add place form
Merge branch 'master' of github.com:openplans/shareabouts

Conflicts:
	src/flavors/discussions/config.yml
	src/flavors/discussions/static/pages/home.html
Emit a panelshown event when the content panel is shown
Add a PlaceSummaryListView in the discussions flavor