push second view controller when forst view controller loads view
various logging
tidy up and create a new VC to present
add third VC
seems to be working
tidy up & add logging
tidy up
log recognizer state
prevent pan left from popping and pan right from pushing
fix bug where user pans while animation in progress by beginIgnoringInteractionEvents and endIgnoringInteractionEvents in the appropriate places
remove comments
change third VC to green