Merge pull request #194 from blushmessenger/master

added visionDidEndVideoCapture delegate
currently pbjvision will always interrupt any system audio that is playing during video capture, allow the user to use own audio session configuration
missed semicolon
use default here
Merge pull request #195 from rromanchuk/feature/support-audio-sessions

Allow user defined audio sessions
Setup mirroring after session configuration so output respects mirror setting
Merge pull request #198 from bcherry/fix_mirroring

Setup mirroring after session configuration so output respects mirror setting
bump build to v0.3.4
changing session presset at runtime
Merge pull request #206 from riosc/changing_session_presset_runtime

changing session presset at runtime
Update CONTRIBUTING.md
Update README.md
Update CONTRIBUTING.md
Update README.md
PBJVision, remove deprecated method for iOS 8

https://github.com/piemonte/PBJVision/issues/208
PBJVision, minor whitespace change
PBJVision, bump podspec v0.3.5
update travis ci configuration
update travis ci configuration
travis-ci, update configuration