pwstrorage: naieve password storage backend autodetection

this should probably be replaced with something a little
more intelligent at some point in the future.
atrous: cleanup presets

most of these presets represent subtler or stronger versions, that
can be achieved by mixing to 0.5 or 2.0

naming was slightly adjusted to get better (alphabetic) sorting
OSX packaging: minor change to make-app-bundle
Merge branch 'master' of https://github.com/darktable-org/darktable
Fix a regression in flip iop legacy params handling

Previously it was not always needed, but it might be
in history stack as "orientation (off)", but now we
always want it by default, so enable it.
If user want's, he can disable it.
Updated Dutch translation
Merge pull request #625 from MRIG/master

Updated Dutch translation
Fix (r2) a regression in flip iop legacy params handling

If flip iop is disabled, enable it,
and replace params with default_params.
Update French translation.
VNG4 for Bayer sensors

This brings the Bayer-specific code from dcraw into linear and VNG
interpolate, so that it can work as VNG4 for Bayer images.

also misc. cleanups:
- lin_interpolate(): don't need to offset by roi_out x/y which is set to
  0,0 by process()
- vng_interpolate(): alloc a single memory range for both buffers
Merge pull request #627 from dtorop/vng4

VNG4 for Bayer sensors
demosaic: properly capitalize AMaZE since other are capitalized too
demosaic: indicate VNG4 is slow
Fix (r3) a regression in flip iop legacy params handling

Basic Idea: if history stack has flip iop with orientation != -1,
then this history stack was, either:
1) created before regression (and had gone through legacy_params, which never produces -1), and we need to fix it!
or
2) created after regression (by manual changes to flip iop, and we should not fix it

Q: Is there a way to differentiate between these two?
rawspeed: Nikon P7000 high iso fix
rawspeed: implement RawImageData::getDataUncropped()
Bauhaus: add dt_bauhaus_slider_set_boundaries
Histogram: replace dt_iop_roi_t with new dt_histogram_roi_t
Needed preparations for loading of uncropped, unscaled (B/W) raw images
dt_imageio_open_rawspeed(): break everything! Stop cropping.