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Merge pull request #4 from eselkin/master

Update README.md
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

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

Added kelvin silva to readme.md
Delete README.md~
fixed markdown formatting
created files to support initial design
edited formatting
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Update README.md
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Update README.md
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Merge pull request #8 from RomeroLuis/master

Luis Romero