Unhook Blog from urlconf/view/template

Keep the model around in case we decide to bring it back or do
something with the data.
cleanup home.html whitespace
Move recent activity lists up on homepage

The Recently Added and Recently Reviewed sections are going to be part
of a general 'news' section that will be featured above the static
directory listings at the bottom of the homepage.
Add twitter feed to homepage
Add carrot logo as vendor_detail map icon

Partially fixes Github Issue #152

The carrot icon needs some work to look more like a map
icon. Otherwise this works great.
Merge pull request #223 from steventlamb/topic/misc_ui_updates

Topic/misc ui updates