Merge pull request #1 from Jmtorres138/master

added Hi Heather to README
Revert "added Hi Heather to README"
Merge pull request #2 from hwheeler01/revert-1-master

Revert "added Hi Heather to README"
add license file
how to get data from GTEx exchange
Merge pull request #3 from hakyim/master

added license and edited read me