Updated launch notebook to allow for explicit directory
adding to launch_notebook.py the ability to launch at an arbitrary directory
Direct launching now working
Cleaning up the notebooks directory
Some changes to the online notebook.
Delete AWSCredentials.py
 updating Launcher
Merge branch 'master' of https://github.com/yoavfreund/UCSD_BigData
Commiting changes.
Merge branch 'master' of https://github.com/yoavfreund/UCSD_BigData
Merge https://github.com/yoavfreund/UCSD_BigData
Improve-V1