darktable 1.6.1

this is a point release which fixes a couple of minor issues in the recent feature release 1.6.0 (such as a crash with images greater than 134 megapixels).

happy holidays everyone :)

sha1sums:
e3e0014361081364b56b6c02e886ba2fba6c6887 darktable-1.6.1.tar.xz
7173938cad7cd4c4a86de9438517c17166008f3c darktable-1.6.1.dmg

General improvements:

• Hide mouse in slideshow mode
• Show option for txt overlay in the preferences
  Bugfixes:
• ImageIO format TIFF: use scanline-based I/O. Fixes bug #10230
• exif: always try to use Exiv2's lens detection for Olympus
• demosaic: fix assertion
• Do not deadlock in input color profile on unsupported input profiles
• ensure that quick access preset menu is displayed correctly
• Properly disconnect from the mipmap signal when leaving tethering mode
• Avoid integer overflow on big images
• OSX HiDPI fixes
• Lua fixes

Modules:

• masks: enhance mouse hover detection
• masks: allow smaller radius for circle and ellipse
• spots: fix icon states bug #10216
• spots: rounded correction. Fix bug #10045
• spots: legacy_params(): adapt for latest mask changes
• flip: fix legacy presets update
• exposure: enable soft boundaries for black
• zonesystem: remove stale button_release() callback
• graduatednd: avoid rounding issues for rotation after moving whole line. Fixes bug #10241

Camera support:

• Pentax *istDL
• 7D Mark II sRAW/mRAW
• Samsung NX1

White balance presets:

• 7D Mark II
• Panasonic DMC-LX7