Adds CmsLockOperations and CmsLock classes
Modifies schema to include locks table
Adds jquery plugin for working with locks via ajax
Adds new Jquery UI wrappers for alert and confirm
Adds new siteprefs for locking
Adds new relative_time modifier
General bug fixes and cleanups
Modifies ContentManager module to support and display locking info in the page list and the ability to steal locks.
Modifies ContentManager editcontent to lock, and regularly touch locks
  (still have to handle the lock being stolen while editing problem).
modifications and fixes to the dirtyform plugin (adds another callback)
fixes to the cms_admin_tabs class.
Restrict Unknown Params is now true by default.
Fixes and enhancements to the CmsException base class.
Adds new lang strings and new js function cms_lang() to the cms_admin_setup.php file.