Various Things

Gave INT and SWI their own area of dominion
Added ability to register custom interrupts for use with SWI
Added LOCK to secure instructions under a certain ring level
Labels for use with JMP
HLT instruction to halt the system
Literals display both their true and resolved form in the console
Strings are now case sensitive
Blank lines no longer trip up execution
Bootloader now prepares the first 512 bytes rather than the first 512
integers
PC register moved from R13 to R15 - Still debating if changing via MOV
is allowed...
Underscores are automatically removed from code before execution. Use
them to distinguish the instruction from the condition code