Sample Project: PBJStrobeView, import QuartzCore

fixes GH-3
PBJVision.podspec: updated with required frameworks

fixes GH-6
PBJVision: code path cleanup for video recording, removes fallback of buffers that aren't offset
Debug.xcconfig: updated the sample project debug configuration
PBJVision: addressed issues effecting rapid pause/resume from working properly

fixes GH-8
PBJVision.podspec : updated podspec
PBJVision: ensure black frames aren't captured first
Revert "PBJVision: ensure black frames aren't captured first"

Requires more testing.

This reverts commit f2b958e2b195eef3b38d666cc3a4bfb9b254cc15.
PBJVision: block audio until a video frame has been written, fixes GH-11
PBJVision: remove unused delegate methods
PBJVision: update methods to properties
PBJVisionUtilities: added an NSString extra for generating a timestamp
PBJVision: minor cleanup, added preset for videoRange buffer types
PBJVision: write metadata into output files
PBJVision: onion skinning (ghosting), fixes GH-1
Update README.md