upgrade_status 6.x-1.0

Changes since DRUPAL-5--1-3:

• #264980 by sun: Various UX improvements.
• #265061 by webchick, sun: Added title and link for not (yet) upgraded modules.
• #265419 by sun: Fixed clicking on project title/link toggles collapse status.
• #265062 by webchick, sun: Added select to choose target version of Drupal core.
• #268578 by dww, sun: Fixed missing modules moved into Drupal 6 core.
• #270531 by sun: Added a bunch of other modules moved into Drupal 6 core.
• #269663 by sun: Removed local tasks on Upgrade Status pages.
• #265412 by sun: Removed auto-update of cached data.
• #297335 by naught101, Rob Loach, sun: Ported to 6.x.
• #297335 follow-up by sun: Fixed left over coding style issues.
• #728608 by philbar, sun: Fixed unsupported releases are missing status text.
• by sun: Revamped entire module and synced with Update module.
• #620714 by philbar, sun, klonos: Added modules which are in D7 core.
• by sun: Fixed PHP notice and styling for not yet ported components.
• #732054 by sun: Added support for Update status advanced module.
• by sun: Removed .info for experimental and outdated Upgrade Assist module.