handleMediaServicesReset now configures AVAudioSession per QA1749

(new) Audio parameter views on iPhone now have a 'Dismiss' button in addition to 'Swipe down' to dismiss. (modified) AVAudioEngine is now paused when nothing is playing or being recorded. (modified) Refactored some methods to support pausing and to ensure proper initialization after reset or engine reconfiguration.

Explicitly use the buffer format as the connection format for the player to reverb & reverb to mainMixer, to make it clear that these formats must match. Project updated for Xcode 8.2.1.

Updated for iOS 9 and Xcode 7

Improved handling of audio interruptions, added audio key to the UIBackgroundModes, audio category changed to Playback from PlayAndRecord. Fixed a bug in handleMediaServicesReset:

First public release.