pong/out tweaks needed

[twiddlingbits]

I added pong/out to .gitignore so it isn't committed to repo.

But, in theory, the examples should run without building them. This means, i think, that the *.js build artifacts should be committed to github. So the pong/out .gitignore needs tweaking to accomplish this (only the js that is imported at runtime should be in repo).

(I probably have the same issue in the lib example as well)