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/fixtures/issues.yml

@@ -189,3 +189,17 @@ issues_012:
   status_id: 5
   start_date: <%= 1.day.ago.to_date.to_s(:db) %>
   due_date:
+issues_013:
+  created_on: <%= 5.days.ago.to_date.to_s(:db) %>
+  project_id: 3
+  updated_on: <%= 2.days.ago.to_date.to_s(:db) %>
+  priority_id: 4
+  subject: Subproject issue two
+  id: 13
+  fixed_version_id: 
+  category_id: 
+  description: This is a second issue on a cookbook subproject
+  tracker_id: 1
+  assigned_to_id: 
+  author_id: 2
+  status_id: 1