Update READMEs.
profiling code

fixes exchange_token method

Removed print
Merge pull request #14 from buzzfeed/0530-AK-50826065-exchange-token-rc1

profiling code
Merge pull request #9 from buzzfeed/0108-FS-write-readme

Update READMEs.
fixed README
added installation instructions to README
merged master -> 0124-GO