Implement CHIP-8 Instructions: Timer

[fokoid]

• 0xFX07 Sets VX to the value of the delay timer. (Vx = get_delay())
• 0xFX15 Sets the delay timer to VX. (delay_timer(Vx))

Pseudocode and descriptions were sourced from the CHIP-8 Wikipedia article and are licensed under the Creative Commons Attribution-ShareAlike License 3.0.