bmguest:
- irq handling with exception table for non-secure mode
- trivial gic virtual cpu interface access (GICV_*) for interrupt ack/completion

monitor:
- minimum vgic implementation : maintenance interrupt handling for LR cleanup for complete irqs
- software virq injection
- most part of virtual irq handling not implemented: such as guest context switching integration and pending irq queuing
Merge branch 'proto2' into vgic
Merge pull request #19 from simonkim/vgic

Vgic - Virtual IRQ Test code in vgic.c and bmguest/
Merge branch 'proto2' of https://github.com/kesl/khypervisor into proto2