Performance enhancements

Multi-platform Symmetric Multi-Processing
Working:
Alpha, VAX
i386 (On branch)
Spins up CPUs, needs more help:
PowerPC, SPARC, UltraSPARC
Still needs stability and scalability improvements
High performance user threads, via scheduler activation support in the kernel (On branch)
Virtual Memory (VM) improvements
Unified Buffer Cache
Round-robin page coloring