Added an API token for each User to use when making API requests. (#3920)

The API key will be displayed on My Account page with a link to reset or
generate a new one.  All existing users will have a token generated by the
migration.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3217 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20091221004949_add_api_keys_for_users.rb

@@ -0,0 +1,13 @@
+class AddApiKeysForUsers < ActiveRecord::Migration
+  def self.up
+    say_with_time("Generating API keys for active users") do
+      User.active.all(:include => :api_token).each do |user|
+        user.api_key
+      end
+    end
+  end
+
+  def self.down
+    # No-op
+  end
+end