Log Message:
Update to 0.1.8:

0.1.8
------------------------------------------------------------------------
Updated to libraw 0.6.13:
 - Bugfixes in RIFF reading code. .
Updated to libraw 0.6.12:
 - Hasselblad V96C support.
Updated to libraw 0.6.11:
 - Fixed serious bug in loading metadata from external JPG file.
Updated to libraw 0.6.10:
 - Support for loading White Balance data from Sony ARW files edited with Sony \ 
IDC software.
Updated to libraw 0.6.9:
 - Better support for Samsung S85.
 - Fixed possible integer overflow in wavelet denoising code.
Updated to libraw 0.6.8:
 - Changes in QuickTake 100 files processing.
Updated to libraw 0.6.7:
 -Added support for Samsung S85.
 -Changes in external jpeg (metadata) processing.
Updated to libraw 0.6.6:
 -Changes in Panasonic FZ50 processing code.
Updated to libraw 0.6.5:
 -Fixed file descriptor and buffer memory leak when thumbnail extractor is called,
  but library object is not properly initialized.
 -Fixes in Imacon files unpacking.
 -Fixes in Hasselblad .fff files unpacking.

Fix PPM color preview extraction.