updated translation
Merge remote-tracking branch 'upstream/master'
Merge branch 'purge-unused-tags' of https://github.com/darktable-org/darktable
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
usermanual: lighttable concepts section
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into usermanual
rename rc.lua to luarc to be more in line with other configuration files
make lua shortcuts a toplevel shortcut groups