Update installation documentation
Merge branch 'master' of https://github.com/jack2684/mg-game into development

Pull code for stupid robot game prototype
STUPID ROBOT - update default values, add arcade image
STUPID ROBOT - rename assets folder

Make assets folder name all lowercase,
matching naming convention of other game assets folders.
STUPID ROBOT - fix links, comment out test code
comment out the console.log in animation_score.js
we don't need them anymore
fix the the clearing up problem
by simply stop calling the renderFinal multiple times. Though I didn't fix the actual problem underneath, but it should be fine
add music button to splash page
and it works fine. but the button in game page still not working, I think it is the merging problem