Primitive OS / Bootloader Pair

Fixed bug with CPSR flags not being set to false
Allowed for string and hex literals for extra data within the image.
This allows for stuff like the "No operating system found" message to
appear within the source rather than being added later
NOP instruction throws error
Clear now queues and syncs with the next frame to avoid flickering
DSTR now only works in a higher state
r14 now set on both states involved in an interrupt
Instruction output reduced
Both key code and character code included in 0 interrupt data
Booted disk ID persists through boot procedure
Bootloader / OS pair created, allows for the user to type text which is
stored in memory. This is a proof of concept for both bootloaders and a
terminal-like construct