Added basic support for CVS and Mercurial SCMs.

Browsing, changesets fetching and diff viewing are implemented.
Only tested with local repositories.

Thanks to Ralph Vater for CVS specific code.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@559 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/053_add_changes_branch.rb

@@ -0,0 +1,9 @@
+class AddChangesBranch < ActiveRecord::Migration
+  def self.up
+    add_column :changes, :branch, :string
+  end
+
+  def self.down
+    remove_column :changes, :branch
+  end
+end