Perfact-zodbsync

* Add --grep option to pick subcommand

* Add reset subcommand

* Refactor argument parsing and subcommand logic

* Only initialize ZODBSync object if connection to ZODB is required

* Make sure each command releases the lock correctly

* Clean up initialization of ZODBSync object

* Use explicit transaction manager

* Add some tests for the watcher

* Fix playback of local roles

* Restore graceful shutdown of watcher

* Switch tests to use a socket for the ZEO connection

* Delete roles and local roles on playback if they are not set in the file
(22)

* Fix recognition of redundant paths when playing back (50)

* Record proxy roles independent of acquired roles (49)

* Adjust remaining code to the fact that config is now a dict and not a
module

* Read Page Template source code without triggering macro expansion

* Unregister signals before waiting for lock so we may be interrupted

* Fix config path in README

* Clean up Python 2 compatibility code

* Add subcommand with-lock and option --no-lock