Fixed a to_python error.

Added support to reject connection requests.
Changed engines.precache classes to precache on instantiation and server_spawn instead of relying on calling their index property.
Repeat multiple repeats

Fixed a problem where the repeats would just keep on building
Merge pull request #30 from ThaPwned/master

Repeat multiple repeats
Moved weapons.manager._Weapon to new weapons.instance module and made the class public.

Made listeners.tick.delays._Delay public and added a 'cancel' method to more easily cancel an instance.

Removed '__all__' declaration from listeners.tick.delays and listeners.tick.repeat as the objects are exposed via listeners.tick.__init__
Removed duplicate '__all__' values.  The only remaining duplicates are the functions in entities.helpers that are also a part of players.helpers.
Merge branch 'master' into entities_changes