OR-837 set split button dropdown for community/project creation access
OR-837 Externalize the modal creation directive

We need this directive to destroy the modal on hide.
OR-837 remove home partial, redirect / route to /communities
OR-837 Use Angular 1.3 async validator for community unique title check
OR-837 Split community creation in several steps
OR-837 Project creation dialog
OR-837 refactor avatar picker

Created an avatar-picker directive in the avatar module.

It's currently used by the project & community modules. The avatar#selectionService
allows loose-coupling.
Merge pull request #625 in OR/rse from ~MBAILLY/rse:OR-837-create-the-project-creation-wizard to master

* commit 'c92d0d33c2b430ef5145ddbea663c8d348afac24':
  OR-837 refactor avatar picker
  OR-837 Project creation dialog
  OR-837 Split community creation in several steps
  OR-837 Use Angular 1.3 async validator for community unique title check
  OR-837 remove home partial, redirect / route to /communities
  OR-837 Externalize the modal creation directive
  OR-837 set split button dropdown for community/project creation access