Updated version to .13

Updated version to .13
Changed the skill learner to batch skills learned in groups of 25, so that the client gets a
breather every so often when learning a large list of skills, and the UI doesn't become unresponsive.
Fixed a possible issue with horked reagent information that would cause the queue handler to
fail on some intermediate items.  A (hopefully) useful error is now given to the user to easily
identify the location of the problem.