Add dual licensing (MIT + GPL)
Merge branch 'development'

* development:
  Remove unnecessary file
  Changes to fix issues with versions
  More stuff...
  Version bump
  Method for getting path parts, cleanup, tests
  Beginning work on issue #15 (generic permission system)
  Beginnings of new permission system
  Cleanup old classes & files
Version bump (from merging development)
Fix version issue, new method, session update fix

 * Set the version file location so there it doesn't cause an issue
 * better way of updating session (so only "num_checkins" and "last_update" are modified)
 * return error (if there was one) on doUpdate()
 * added "checkin()"
 * added "get_recently_active_sessions()"
Version bump