Added ID argument for the box function#170

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theGreatWhiteShark wants to merge 4 commits into

rstudio:mainfrom

theGreatWhiteShark:master

Commits on Dec 20, 2016

adding the ID tag to the outmost div object in box() for a better control in the .css file
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Commits on Dec 21, 2016

Commits on Jan 10, 2017

adding README to explain motivation behind forking
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