Balance Adjustments

[*]Alien now summons a robot assistant while removing itself.
[*]Demon Hunter earns more coins after upgrading.
[*]The Programmer's production boost has been changed from 4 to 3.

Bug Fixes

[*]Fixed an issue where the coin animation wouldn't disappear after restarting the game in the middle.
[*]Fixed additional production issues caused by the salesperson.