updated some copyright info
BitNet tower and keyboard improvements.

New BitNet Tower model.
BitNet Twoer is now cheaper to create
BitNet Tower no longer has Modem Interface, instead has Mini Cell.
BitNet Tower can be climbed like a ladder (1.7.10 only).
BitNet Tower has a larger default range, and lower sending delay.
Opening the Keyboard now has a 1 second delay so the camera can be readjusted.
version bump and ComputerCraft API update