iop/soften: Drop locals range and hr, and fixup comment

hr is always equal to radius, and range is only used to calculate hr.
iop/soften: Use SSE for inner blur loop
iop/soften: Apply OpenMP to inner blur loops
src/iop/soften: Use SSE in final output stage
iop/soften: Use _mm intrinsics instead of operator overloading for compatibility
Italian translation updated
Merge pull request #267 from bartokk/master

Italian translation updated
Remove strange file that came with the Italian .po
Add const modifier to the view() routine.
Add a way to expose all image statuses.

No default shortcut defined for this action.
Merge branch 'expose-status'

* expose-status:
  Add a way to expose all image statuses.
  Add const modifier to the view() routine.
Revert "views: Update dt_view_get_image_to_act_on for zoom==1 & full_preview."

This reverts commit ebcc7c27edb72c190b3392e254395c9d452f877c.

This commit changed the size of the settings struct stored in db so we
drop it when loading an old db.
TODO:
- fix this commit (lemagoup is already working on it)
- stop writing this stuff to db
Fix compilation on some system.
[l10n] Swedish update: lowcasing spree translated
Italian translation updated for the new option 'expose-status'
Strings: Acronyms capitalized.
connect key accel callbacks to bauhaus sliders (complements commit 09a02f4093f52)
Merge remote-tracking branch 'bruceg/soften-speedups'
Add lift/gamma/gain module

I am neither sure whether the math could be improved nor the place in
the pipe is ideal. Please test and expect changes that could break your
history stacks.
masks: add ellipse shape

GUI wise this should be mostly straightforward. to rotate the ellipse
CONTROL-Click on the form.