Git patch added (#259) with annotate support. Changeset revision field changed to string.

TODO:
* fix Darcs support and add tests for Darcs
* maybe remove scmid column by moving commit hashes to Changeset#revision for all DSCM

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1201 e93f8b46-1217-0410-a6f0-8f06a7374b81

git/db/migrate/090_change_changesets_revision_to_string.rb

@@ -0,0 +1,9 @@
+class ChangeChangesetsRevisionToString < ActiveRecord::Migration
+  def self.up
+    change_column :changesets, :revision, :string
+  end
+
+  def self.down
+    change_column :changesets, :revision, :integer
+  end
+end

git/db/migrate/091_change_changes_from_revision_to_string.rb

@@ -0,0 +1,9 @@
+class ChangeChangesFromRevisionToString < ActiveRecord::Migration
+  def self.up
+    change_column :changes, :from_revision, :string
+  end
+
+  def self.down
+    change_column :changes, :from_revision, :integer
+  end
+end