Adds a 'Add subprojects' permission.

* 'Add project' permission will let user create a root project
* 'Add subprojects' permission will let project members create subprojects

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3238 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/project_test.rb

@@ -282,7 +282,7 @@ class ProjectTest < ActiveSupport::TestCase
     user = User.find(9)
     assert user.memberships.empty?
     User.current = user
-    assert Project.new.allowed_parents.empty?
+    assert Project.new.allowed_parents.compact.empty?
   end
   
   def test_users_by_role