Versions can now be created with no date.

Versions with no date appear at the end of the roadmap, sorted by name.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@536 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/versions/_form.rhtml

@@ -4,7 +4,7 @@
 <!--[form:version]-->
 <p><%= f.text_field :name, :size => 20, :required => true %></p>
 <p><%= f.text_field :description, :size => 60 %></p>
-<p><%= f.text_field :effective_date, :size => 10, :required => true %><%= calendar_for('version_effective_date') %></p>
+<p><%= f.text_field :effective_date, :size => 10 %><%= calendar_for('version_effective_date') %></p>
 <!--[eoform:version]-->
 </div>