updated & simplified code a bit
modernized example code a little
Merge branch 'dev' of https://github.com/dmojdehi/AudioSequenceBuilder into dev

Conflicts:
	AudioSequenceBuilderDemo.xcodeproj/project.pbxproj
	AudioSequenceBuilderDemo/PlayerViewController.m
	AudioSequenceBuilderDemo/en.lproj/PlayerViewController.xib
updated gitignore