* src/qemu/qemu_monitor.h, src/qemu/qemu_monitor.c: Add new APIs
  qemuMonitorSaveVirtualMemory() and qemuMonitorSavePhysicalMemory()
* src/qemu/qemu_driver.c: Use the new qemuMonitorSaveVirtualMemory()
  and qemuMonitorSavePhysicalMemory() APIs

* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Add new APis
  qemuMonitorChangeMedia and qemuMonitorEjectMedia. Pull in code
  for qemudEscape
* src/qemu/qemu_driver.c: Remove code that directly issues 'eject'
  and 'change' commands in favour of API calls.

* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Add new
  qemuMonitorSetBalloon() based on existing code in
  qemudDomainSetMemoryBalloon
* src/qemu/qemu_driver.c: Remove use of qemudDomainSetMemoryBalloon()
  in favour of qemuMonitorSetBalloon(). Fix error code when balloon
  is not supported

* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Pull old
  qemudDomainGetMemoryBalloon() code into a new method called
  qemuMonitorGetBalloonInfo()
* src/qemu/qemu_driver.c: Update to call qemuMonitorGetBalloonInfo()
  and remove qemudDomainGetMemoryBalloon().

* src/qemu/qemu_driver.c: Remove use of 'system_powerdown'
* src/qemu/qemu_monitor.h, src/qemu/qemu_monitor.c: Add a new
  qemuMonitorSystemPowerdown() api call

* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Add a new
  qemuMonitorStopCPUs() API
* src/qemu/qemu_driver.c: Replace direct monitor commands for 'stop'
  with qemuMonitorStopCPUs()

* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Rename
  Rename qemudMonitorSendCont to qemuMonitorStartCPUs
* src/qemu/qemu_driver.c: Update callers for new name

* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h: Add a
  new qemuMonitorSetVNCPassword() API
* src/qemu/qemu_driver.c: Refactor qemudInitPasswords to
  call qemuMonitorSetVNCPassword()

* src/qemu/qemu_monitor.h, src/qemu/qemu_monitor.c: Add a new
  qemuMonitorGetCPUInfo() command
* src/qemu/qemu_driver.c: Refactor qemudDetectVcpuPIDs to
  use qemuMonitorGetCPUInfo()

Pull out all the QEMU monitor interaction code to a separate
file. This will make life easier when we need to drop in a
new implementation for the forthcoming QMP machine friendly
monitor support.

Next step is to add formal APIs for each monitor command,
and remove direct commands for sending/receiving generic
data.

* src/Makefile.am: Add qemu_monitor.c to build
* src/qemu/qemu_driver.c: Remove code for monitor interaction
* src/qemu/qemu_monitor_text.c, src/qemu/qemu_monitor_text.h: New
  file for monitor interaction
* po/POTFILES.in: Add src/qemu/qemu_monitor_text.c