upgrade libgphoto2 version 2.4.7

libgphoto2 2.4.7

This is a 2.4 release branch update.

libgphoto2:
   * Translation updates from translationproject.org.
   * Widget and choice lists now dynamic, to be able to create longer ones.
   * 3rd generation UDEV rules emission, now able to emit "post HAL"
     UDEV rules.

     print-camera-list udev-rules version 136 > /lib/udev/rules.d/40-libgphoto2.rules

   * Disabled LRU of images. Not really useful in times of USB 2.0,
     also disabled by at least Debian und Ubuntu already.

libgphoto2_port / USB:
   * If we detached a USB driver, reattach it on close.
     This allows using e.g. cheap camera as both webcam with in-kernel
     driver and still camera with libgphoto2.

PTP2 driver:
   * Renamed various configuration options and changed values to
     match a unified model. Some common names have changed:
          owner->ownername
          exptime->shutterspeed
          eos-* -> non-eos prefixed variants
          etc.
     You will need to review configuration setting code if you have any.

   * Create config submenus /actions for action triggers and /status for
     read-only values, moved stuff there.

   * New IDs:
    Kodak M863
 Canon Digital IXUS 110IS, IXUS 100IS, Powershot SX200IS, SD780 IS, A1100IS
 Canon EOS 500D
 Fuji Finepix F200 EXR
 Apple iPod Touch first generation

   * Lots of Canon EOS capture improvements, for card capture, for LiveView,
     and for property setting. More properties are now possible.
   * Canon EOS Bulb mode support (available in newer canons).
     --set-config bulb=(0|1)

   * Fixed Nikon DSC shutterspeed setting (also for times < 1/1000)
   * Enable Viewfinder on demand for Canon Powershot, not for all capture things.
   * Generic PTP Property Get/Set in the configuration handling.
   * Decode more Nikon DSC properties (for D90 now nearly complete).
   * Turned several PTP generic commands to macros to reduce number of functions.
   * MTP player list synced with libmtp 1.0.
   * Lots of bugfixes.

Canon driver:
   * Renamed various configuration options and changed values to
     match a unified model.