Add provisioner support for analytics tracking ids

Fixes #328 on github

In the private settings, pass in the tracking ID.
Bring back notes field on new_vendor form

fixes #335 on github

essentially reverses e31e15b93a26d4249eb4db57c2d3e2956203a9cb
Merge pull request #336 from steventlamb/topic/335_bring_back_notes_field

Bring back notes field on new_vendor form
update alis bio
Merge pull request #338 from ahoefinger/topic/about_page_ali

update alis bio
Fix bug in tracking initialization code
Merge pull request #332 from steventlamb/bug/328_analytics

Add provisioner support for analytics tracking ids
Show vendor name errors in new_vendor form

fixes #337 on github
Merge pull request #339 from steventlamb/topic/337_vendor_errors

Show vendor name errors in new_vendor form
clean up vendor detail page
Merge pull request #341 from ahoefinger/topic/vendor_detail_page_updates

clean up vendor detail page
Cleanup comment
Install supervisor from pip instead of apt

fixes #278 on github

also create the necessary init files
Merge pull request #342 from steventlamb/topic/supervisor_from_pip

Topic/supervisor from pip