* update all language PO files
* resolve issue with incorrectly declared % sign fixed yesterday
* remove plural forms from zh_CN translation (confirmed w/ Wu Tianhou)
* all files now comply with the "msgfmt -c" consistency check
updated pt_PT translation
[l10n] Swedish update: fuzzies to take care of after the recent update
rawspeed: panasonic dmc-gh3 aspect ratios
(cherry picked from commit 1bc86a9fb2bdd174759478cfea4dca0b4c6676d0)
colormatrices: nikon d80 enhanced matrix
(cherry picked from commit e4ca7de438473114987162a91b7a779217e86de8)
Update translation pt_BR release 1.2.1
Merge pull request #229 from guitorri/update_pt_BR

Update translation pt_BR release 1.2.1
masks and blending: fix bug in edit-mode togglebutton
Merge branch 'master' of ssh://github.com/darktable-org/darktable
curve shape : avoid hole in the drawing
Add strengh modifier to clone circle.
Minor code refactoring.
Minor reformatting.
Add const where possible.
Add support for content aware cloning.

In this mode the area is analyzed and a slider can be used to clone only
pixels above a the threshold.

For #9385.
Add new button to show the created mask.