updating online optimization
update notebook
Updated the directions for doing and reviewing HW.
added docs to NotebookCollections.md
Adding several files.
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
Merge branch 'master' of https://github.com/yoavfreund/UCSD_BigData

Conflicts:
	notebooks/eigenfaces/.ipynb_checkpoints/EigenFaces-checkpoint.ipynb
	notebooks/eigenfaces/EigenFaces.ipynb