Rewrote MultiCurl to be concurrent and async
Added example of how to use concurrent multicurl
Fixed documentation
Fixed missing isset, causing a notice
Added test case to show multicurl run concurrently
Removed example code, since this is now covered by the test cases
Trying to get Travis to run tests as they should
Merge remote-tracking branch 'troelskn/feature-concurrent-multi-curl'
curlm cleanup
test fixes