because whynot. Also adjusted String.cast method to be less silly.

currently only via applyArguments, not generateArguments.

version numbers synced), but here we are again.

 - HasProperties.addProperty ignores requests to add an already-present
   property to an instance. This is because, if the property has been
   added to a prior instance of the same class, it will be available
   on the new instance.

 - SyncableHasProps no longer uses its own metaclass, instead dynamically
   adding sync properties in __init__.