Added Mac-specific settings dialog that looks more native
Don't show ocsync version, it's part of mirall now
NSIS: depend on Qt5-based installations
Add translations when using Qt5 as well
-fPIC is implied on Windows
Update owncloudcmd docs

Fixes #1587
Merge branch 'master' of github.com:shadone/mirall into shadone-master

Conflicts:
	cmake/modules/QtVersionAbstraction.cmake
	src/CMakeLists.txt
	src/mirall/owncloudgui.cpp