translation_overview 6.x-2.1-beta2

Changes since DRUPAL-6--2-1-BETA1:

• #369800 by drewish: Follow up, adding language was creating column with the old style name.

Changes since DRUPAL-6--2-0:

• Fix one small PHP warning.
• #430918 by drewish: New content isn't added to the content/translation_overview_assignments/ listings.
• #418244 by joostvdl: Put the module into the Multilangual package.
• #369800 by drewish: Rename the language columns in {translation_overview_priority} so they don't conflict with SQL reserved words.
• Trying to get the help legend displayed again. Fixing PHP notices that cropped up in the process.
• #363016 by drewish: Use Drupal permissions to store language managers rather than the custom variable.