add vmi_set_vcpureg function for both PV and HVM Xen VMs. (KVM lacks register modification capabilities)
Merge pull request #49 from smaresca/vcpu_set_reg

add vmi_set_vcpureg function for both PV and HVM Xen VMs
Minor fixes to the v2sym routine
Merge pull request #51 from tklengyel/v2sym_fixes

Minor fixes to the v2sym routine
Translate dtb to pid
Merge pull request #50 from tklengyel/dtb_to_pid

Translate dtb to pid