Merge pull request #1 from ansballard/master

assets
Merge pull request #2 from ansballard/master

collision works, hooray
Merge pull request #3 from ansballard/master

so many changes, not even going to try
Merge pull request #4 from ansballard/master

all the things
Merge pull request #5 from ansballard/master

some things
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Merge pull request #2 from chargao/gh-pages

iudex