kvm-64 release

http://thread.gmane.org/gmane.comp.emulators.kvm.devel/15061

Major changes: PCI hotplug; improved PIT accuracy; paravirt mmu.

Changes from kvm-63:
- kvm clock fixes (Glauber Costa)
- kvm clock enable/disable bit (Glauber Costa)
- in kernel pit model (Sheng Yang)
   - improves timing accuracy for certain guests
- fix bad tss handling causing ioperm() to fail on the host
- paravirt mmu support (Marcelo Tosatti, Anthony Liguori, me)
- set accessed bit on non-speculative shadow ptes
   - minor performance improvement
- fix init_rmode_tss() locking (Marcelo Tosatti)
- fix dirty bit being lost when write permissions are removed from a 
page (Izik Eidus)
- code cleanups
- module option for disabling flexpriority
- fix apic access page memory leak
- hardware task switching support (Izik Eidus)
   - for freedos and similar guests
- fix extboot failures under certain conditions (Anthony Liguori)
- export vcpu thread ID via qemu monitor (Glauber Costa)
   - can be used to implement vcpu->cpu pinning
- pci hotplug (Marcelo Tosatti)
   - can now add and remove nics and drives dynamically
- fix virtio memory region sizing (Marcelo Tosatti)
- fix segfault on disabled virtio nic (Dor Laor)
- fix sci interrupt on pmtimer wraparound (Dor Laor, Yaniv Kamay)
- fix qemu exit on pci hotplug failure (Ryan Harper)
- fix 'make clean' destroying configuration (Ryota OZAKI)
- ppc userspace updates (Jerone Young)
- improve IDE and SCSI DMA speed