Add install instructions to README
Add install instructions to README

Fixes #6, thanks for keeping me honest @soffes.

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haker9521/Clover,lsimsek/flint2,pengwynn/flint,elkingtonmcb/flint,ravin-regmi/flint,elkingtonmcb/flint,haker9521/Clover,pengwynn/flint,lsimsek/flint2,ravin-regmi/flint