update to 0.14.7
This switches to the new major release.
The most significant change of this version is multiple rendering
of same RAW data without re-opening RAW file.
So, it is possible to implement near-realtime preview of entire image in
half-resolution mode and realtime preview of selected area (e.g. around
mouse pointer position) in full-resolution mode.
+Support for more cameras

(drochner)