Per project forums added.

Permissions for forums management can be set in "Admin -> Roles & Permissions".
Forums can be created on the project settings screen ("Forums" tab).
Once a project has a forum, a "Forums" link appears in the project menu.
For now, posting messages in forums requires to be logged in. Files can be attached to messages.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@529 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/messages/_form.rhtml

@@ -0,0 +1,17 @@
+<%= error_messages_for 'message' %>
+
+<div class="box">
+<!--[form:message]-->
+<p><label><%= l(:field_subject) %></label><br />
+<%= f.text_field :subject, :required => true, :size => 80 %></p>
+
+<p><%= f.text_area :content, :required => true, :cols => 80, :rows => 15 %></p>
+<%= wikitoolbar_for 'message_content' %>
+<!--[eoform:message]-->
+
+<span class="tabular">
+<p id="attachments_p"><label><%=l(:label_attachment)%>
+<%= image_to_function "add.png", "addFileField();return false" %></label>
+<%= file_field_tag 'attachments[]', :size => 30  %> <em>(<%= l(:label_max_size) %>: <%= number_to_human_size(Setting.attachment_max_size.to_i.kilobytes) %>)</em></p>
+</span>
+</div>