added Window::Format option that enables native fullscreen button on mac
added FullScreenOptions and using in CinderView.mm
better handling of exit fullscreen
test code for fullscreen options
clarify default params
updating test app to enable trying all fullscreen options
FullScreenOptions documentation
match forward-declaration of FullScreenOptions to def
Merge remote-tracking branch 'reakin/fullscreen_options' into fullscreen_options
Minor tweaks to FullScreenOptions
Fixing libc++ requirements on test/ScreenSaverTest
Removing secondaryDisplayBlanking from AppBasic::Settings
FullScreenOptions used for launch time fullscreen settings.
fixed new setFullScreen:options: signature for screensaver app impl (it's no-op)
Merge pull request #291 from reakinator/fullscreen_startup

Fullscreen startup
MSW setFullScreen() should respect options now
Enabling secondary window blanking on MSW
Adding include() methods to Area
Fixing Mac Display impl to measure relative to upper-left corner
Half-implemented spanAllDisplays() method