Phriction - if you can't edit x/y don't allow creating x/y/z

Summary: ...how do you lock down entire areas otherwise? Fixes T6496.

Test Plan: used user 1 to create x/y that user 2 can't edit. tried to create x/y/z as user 2 and got a big ole error dialogue.

Reviewers: epriestley

Reviewed By: epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T6496

Differential Revision: https://secure.phabricator.com/D10819
Add icon, color and profile image to project.query

Summary:
 - The icon CSS tag is transformed through the new function
   PhabricatorProjectIcon::getAPIName($key), which returns
   a name without fa-.

 - Color is a trivial lookup
 - Profile image returns the PHID or null if not available

Test Plan:
 - Create two projects, with different icon and color,
   one with and one without profile image.
 - Request information on both using project.query
Then:
 [ ] Confirm icon and colors are correct for both projects
 [ ] Confirm image PHID is correct
 [ ] Confirm image PHID is null for the project without image

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: yuvipanda, Korvin, legoktm, epriestley

Maniphest Tasks: T6501

Differential Revision: https://secure.phabricator.com/D10823
Merge branch 'master' of github.com:phacility/phabricator

* 'master' of github.com:phacility/phabricator:
  Add icon, color and profile image to project.query
  Phriction - if you can't edit x/y don't allow creating x/y/z