[Kst] [Kst-plot/kst] 2ee347: Add 16 bit monochrome tiff datasource.

[Barth Netterfield]

  Branch: refs/heads/master
  Home:   https://github.com/Kst-plot/kst
  Commit: 2ee3477adfab8a304811473889b853a0562358b6
      https://github.com/Kst-plot/kst/commit/2ee3477adfab8a304811473889b853a0562358b6
  Author: Barth Netterfield <netterfield at astro.utoronto.ca>
  Date:   2015-11-09 (Mon, 09 Nov 2015)

  Changed paths:
    M CMakeLists.txt
    M src/datasources/CMakeLists.txt
    A src/datasources/tiff16source/kstdata_tiff16source.desktop
    A src/datasources/tiff16source/tiff16source.cpp
    A src/datasources/tiff16source/tiff16source.h
    A src/datasources/tiff16source/tiff16source.pro
    M src/libkstmath/palette.h

  Log Message:
  -----------
  Add 16 bit monochrome tiff datasource.

QImage can read 16 bit greyscale tiffs, but only keeps the
most significant byte.  This data source uses libtiff to
read them as 16 bit images.