add better Sound error handling
Merge branch 'master' of https://github.com/highfidelity/hifi
fix mixed signal and slot
fix incorrectly named slot in Sound
add property for display name to JS
add a property to Sound to tell if empty
Merge pull request #2695 from birarda/master

changes to smooth JS dynamic bot demo
Merge branch 'master' of https://github.com/worklist/hifi into shared_and_weak_pointers