fixed problems when svn path doesn't point to the root directory of the repository.

a root_url property has been added on the repository. it's automatically retrieved the first time the repository is browsed

git-svn-id: http://redmine.rubyforge.org/svn/trunk@344 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/031_add_repository_root_url.rb

@@ -0,0 +1,9 @@
+class AddRepositoryRootUrl < ActiveRecord::Migration
+  def self.up
+    add_column :repositories, :root_url, :string, :limit => 255, :default => ""
+  end
+
+  def self.down
+    remove_column :repositories, :root_url
+  end
+end