Extracted Memory and IO locations into one file.
Changed from int10h to int05h.

int10h is for video I/0, 05h should be print screen.
Changed when interrupts are enabled. Set up 8279 code.
Added comments to constants, slight change to label.
Code for character queue in memory.

Initialize the queue when keyboard is initialized.
When interrupts are generated from keyboard, character added to queue.
int 16h will dequeue from this queue.
Added code to initialize 8259.

Also able to clear interrupt after keyboard command.
Added code to output to LEDs.

Fixed small error with binary output to interrupt controller.
Merge branch 'features/keyboard-and-led' into development