Fix Pholio feed fatal

Summary: need to filter images that we can't find mocks for. Fixes T3645. Note I have some other errors in my feed which are really tricky to debug and might be garbage data; I want to see what happens in prod post this push.

Test Plan: set a mock visibility to no one and feed worked

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T3645

Differential Revision: https://secure.phabricator.com/D6631
Modernize Releeph project create controller

Summary:
Ref T3092.

  - Check for a duplicate key error;
  - do less single loading and use Query classes;
  - use responsive UI elements;
  - add crumbs.

Test Plan: Created a new project, and hit error cases.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3092

Differential Revision: https://secure.phabricator.com/D6629
Modernize Releeph Request create/edit controller

Summary: Ref T3092.

Test Plan: Created a new pick request. Edited an existing pick request.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3092

Differential Revision: https://secure.phabricator.com/D6630
Add some create mail handlers for paste and files

Summary: Fixes T1144. Though actually I think T1144 wanted some handy way to email from the command-line / arc, this is cooler. :D

Test Plan: set conf properly and then ./bin/mail receive-test --as btrahan --to pasties@phabricator.dev | README  --> it worked...! couldn't test files as easily but verified exception thrown when I tried to test.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1144

Differential Revision: https://secure.phabricator.com/D6622