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

app/views/projects/settings/_versions.rhtml

@@ -5,6 +5,7 @@
     <th><%= l(:field_effective_date) %></th>
     <th><%= l(:field_description) %></th>
     <th><%= l(:field_status) %></th>
+    <th><%= l(:field_sharing) %></th>
     <th><%= l(:label_wiki_page) unless @project.wiki.nil? %></th>
     <th style="width:15%"></th>
     </thead>
@@ -15,6 +16,7 @@
     <td align="center"><%= format_date(version.effective_date) %></td>
     <td><%=h version.description %></td>
     <td><%= l("version_status_#{version.status}") %></td>
+    <td><%=h format_version_sharing(version.sharing) %></td>
     <td><%= link_to(h(version.wiki_page_title), :controller => 'wiki', :page => Wiki.titleize(version.wiki_page_title)) unless version.wiki_page_title.blank? || @project.wiki.nil? %></td>
     <td class="buttons">
     	<%= link_to_if_authorized l(:button_edit),   {:controller => 'versions', :action => 'edit', :id => version }, :class => 'icon icon-edit' %>