Passing path to binary to cleanup function
Move urlretrieve to an else statement. It was fetching resource twice if OS was OS X.
Removing unnecessary path attibution.
Removing folder and downloaded file for unix.
Handling cleanup for OS X
Merge pull request #2 from mccricardo/post-run-cleanup

Post run cleanup
Don't post results if error occurred.
Only post results to datazilla if no errors occur
Disable khronos webglperf