fix for race condition triggered by fast machines where slaves can come up before HTTP server is fully started.
* Fixing the real 404 issue which is a relative path to the config dir. Now changing into the config dir before invoking the script to avoid the problem.
* Also moving the Storm version up to 0.9.0.1
Merge pull request #3 from mesosphere/erich-raceCondtionFix

fixing the 404 by changing to the right directory before launching the mesosified nimbus.