expose QTimer to the script engine
add an example timer script
Merge pull request #1824 from ey6es/master

Fixes for transforms and blendshapes on Blender FBX exports.
Merge branch 'master' of https://github.com/highfidelity/hifi into script-timer
change script timer setup to match HTML dom standard
stop timers when the script does, add cleanup methods
Merge pull request #1815 from birarda/script-timer

expose QTimer to the script engine