Fixed creation and inactivation of FogBugz milestones for corresponding creation and closing of release numbers.

These changes were tested with a live "on demand" FogBugz account running version "8.9.60.0H (DB 816, Build 0)", and for which the FogBugz XML API version is currently 8.1 (according to the results of the "api.xml" resource).
Merge pull request #1 from kenny-evitt/master

Fixed creation and inactivation of FogBugz milestones for corresponding ...