usermanual: more on star ratings, color labels, filtering, and sorting
lua : make the declaration of an union more c99 friendly
force usage of internal lua on OS X until someone is willing to properly fix detection cmake code
Revert "force usage of internal lua on OS X until someone is willing to properly fix detection cmake code"

This reverts commit 92f72605dc0439f475f49d2e22d51d3958b09676.
fix build with external lua on OS X
brush masks: small rendering improvement

this fixes a rare rendering issue where brush strokes could have
gaps close to very sharp edges
updated dutch translation
usermanual: make more clear that bauhaus sliders accept keyboard input
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
update of dutch translations
Merge pull request #311 from MRIG/master

update dutch translations
brush and path masks: fix corner deletion
rawspeed: update to svn r588 (thanks klaus)
rawspeed: add back aspect ratio support for the Pana DMC-G6 and minor tweak for DMC-GH3
wb_presets: Canon PowerShot SX50 HS (stolen from UFRaw)
CR distortion management : no need to round values
Merge remote-tracking branch 'upstream/master'
brush masks: increased reserve in buffer management
usermanual: some fixes for drawn masks