Add Lr cairo button for the import from Lr support.
expose the dt_iop_clipping_params_t struct.

This is needed to be able to construct a clipping item to put
in the history for the import from Lr support.
Initial implementation for the new import from Lr support.

This first implementation covers only the clipping and angle. More
automaatic import will be added later. At least this propose a
framework for the import circuitry.
Add support for exposure Lr import.
Add support for vignette Lr import.
Add support for tags Lr import.
opencl: fix a few syntactical glitches
Merge branch 'po/lr-import'

* po/lr-import:
  Add support for tags Lr import.
  Add support for vignette Lr import.
  Add support for exposure Lr import.
  Initial implementation for the new import from Lr support.
  expose the dt_iop_clipping_params_t struct.
  Add Lr cairo button for the import from Lr support.
  Minor style fixes.
opencl: make it a configuration option whether to synch opencl buffers with pixelpipe cache

for slow GPUs this makes sense, as reprocessing the whole pixelpipe is expensive
for fast GPUs the added overhead (PCIe memory transfers) slows down things dramatically

default is off
Update fr.po for Lightroom import.
opencl: make micro naps during opencl processing a configuration option
Update swedish for Lightroom strings
Merge pull request #156 from levitte/swedish-translation

Update swedish for Lightroom strings
Don't think that images are hovered on empty space

this makes using the lighttable more "intuitive".
noiseprofiles.h: Noise profile for Sony NEX-5N.
noise profile: more 400d data (for mining)
noise profile: nx100 by pascal
Add initial dbus server functionality

Currently you can quit darktable and tell it to load images/folders. It
also passes the images/folders to load passed on the command line to the
running instance when it detects that there is another one active
already.
opencl: avoid uncoalesced memory accesses in module nlmeans
opencl: avoid uncoalesced memory accesses in module denoiseprofile