add hi-res backing reratid code

+ .xib support hi-res backing = on
+ plist NSHighResolutionCapable = Yes
+ notification for hi-res change
+ double click time modify for retina
retina support
	+ correct mouse position
	+ zoom view layout based on DT_SIZE_BASE
Merge remote-tracking branch 'origin/retina_test' into dial

Conflicts:
	dt_osx/src/dt_circle_note_on.cpp