Updated xdg-open to latest rc to fix browser opening 3 tabs on Debian

The original repo by pwnall had a bug that had a manual resolution of replacing the xdg-open script from an external source. It seems that the code was never updated in his repo though.  I grabbed the rc1 code and updated the xdg-open script myself and found that is fixed the debian bug. 

First reference to the bug: https://github.com/pwnall/node-open/issues/7

Second reference to the bug: https://github.com/yeoman/generator-angular/issues/618#issuecomment-38031723