Show community features on logged-in homepage.

Don't show interesting members if there are none
Changes to homepage

 - only show interesting members if logged out
 - don't show your recent posts/plantings
 - change limits on posts/plantings for better visual balance.
Merge branch 'dev' into logged-out

Conflicts:
	spec/views/home/index_spec.rb
Merge pull request #221 from pozorvlak/logged-out

Show community features on logged-in homepage.