Using a higher-priority build_file_filter callback seems more reliable than overriding MT::WeblogPublisher::queue_build_file_filter. Bump to version 1.0.1.

Other Schwartz jobs (notably, Bob the Rebuilder) seem to ignore the override, reverting to MT's default priorities. Using Publishing Priorities with a callback works fine, however the default MT::WeblogPublisher::queue_build_file_filter still runs and gets all the way to trying to insert the prepared job, which seems a little wasteful but works correctly.