removed reference to Grayscale media effect
added project CaptureMediaExtension to Cinder sample CaptureBasic
added mdmerge step, added pch
solved DEFINE_GUID problem
added CaptureMediaExtension.CaptureEffect to Cinder sample; compiles OK, fails at runtime with error
made larger capture preview size
update test_app, includes CaptureMediaExtension.CaptureEffect
doc update