Version sharing (#465) + optional inclusion of subprojects in the roadmap view (#2666).

Each version of a project can be shared with:
* subprojects
* projects in the project hierarchy: ancestors + descendants (needs versions management permission on the root project)
* projects in the project tree: root project + all its descendants (same as above)
* all projects (can be set by admin users only)

Notes:
* when sharing a version of a private project with others projects, its name will be visible within the other projects
* a project with versions used by non descendant projects can not be archived

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3123 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/functional/projects_controller_test.rb

@@ -364,6 +364,15 @@ class ProjectsControllerTest < ActionController::TestCase
     assert_not_nil assigns(:versions)
   end
   
+  def test_changelog_showing_subprojects_versions
+    get :changelog, :id => 1, :with_subprojects => 1
+    assert_response :success
+    assert_template 'changelog'
+    assert_not_nil assigns(:versions)
+    # Version on subproject appears
+    assert assigns(:versions).include?(Version.find(4))
+  end
+
   def test_roadmap_routing
     assert_routing(
       {:method => :get, :path => 'projects/33/roadmap'},
@@ -392,6 +401,15 @@ class ProjectsControllerTest < ActionController::TestCase
     # Completed version appears
     assert assigns(:versions).include?(Version.find(1))
   end
+
+  def test_roadmap_showing_subprojects_versions
+    get :roadmap, :id => 1, :with_subprojects => 1
+    assert_response :success
+    assert_template 'roadmap'
+    assert_not_nil assigns(:versions)
+    # Version on subproject appears
+    assert assigns(:versions).include?(Version.find(4))
+  end
   
   def test_project_activity_routing
     assert_routing(