asm.h now can nuke the TLB by refreshing the PD.
also changed some symbols to more accurately represent what they are
for, such as the kernelspace page tables or the global PD.
Makefile now has VGA=2 to set the QEMU monitor to STDOUT. Nice for
things like memory dumps.
Can now parse the memory and create a bitmap of workable regions.
Allocation soon(tm)
