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Merge pull request #3 from geoffire/master

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Want any description of our level of skill or area of support?
Merge pull request #4 from eselkin/master

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Merge branch 'patch-1' of https://github.com/sagewang/physics-simulator into sagewang-patch1-master

Conflicts:
	README.md

resolved merge conflict
Merge pull request #5 from tomhalstead/sagewang-patch1-master

Sagewang patch1 master
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Merge pull request #6 from luoken/patch-1

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fixed markdown formatting, added example
kelvin
kelvin
Merge pull request #7 from kelvinsilva/master

Added kelvin silva to readme.md
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fixed markdown formatting
created files to support initial design
edited formatting
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