Update README.md

Correcting the JSON
Merge pull request #1 from tilogaat/patch-1

Update README.md
Update README.md
Merge pull request #3 from tilogaat/patch-2

Update README.md to add link to installation instructions
Merge pull request #2 from tilogaat/master

Getting StatsD Backend to work with v2.0 endpoint
Merge branch 'pr/4' into rax_auth

Includes commits from tilogaat and GeorgeJahad.
Extract auth out to its own module.
Handle the 401 as soon as we know the status (for there will not be any data)
README update.