Merge pull request #1 from MathYourLife/060_release

Bumping heka binary to 0.6.0
Bumping default heka version to 0.7.1
Updating the README with attr and bin info

* Tested convergence on Ubuntu 14.04
* Update default attributes listed
* Add notes on required override attributes for a different version
Merge pull request #10 from MathYourLife/bump_heka_0_7_1

Bump default heka version to 0.7.1