added example of using put-
 adding a notebook about mrjob
Cleanup of repository.
added multiplicative bound
cleanup
Merge branch 'master' of https://github.com/yoavfreund/UCSD_BigData

Conflicts:
	notebooks/sorting/.ipynb_checkpoints/Sorting-checkpoint.ipynb
Added multiplicative bounds
Recovered NotebookCollections.md
Merge https://github.com/yoavfreund/UCSD_BigData into HEAD

Conflicts:
	AWS_scripts/NotebookCollections.md
Notebook on mrjob ready for class
Removing credentials file
Changed to AMI with mrjob on it.
Merge branch 'master' of https://github.com/yoavfreund/UCSD_BigData
Merge remote-tracking branch 'upstream/master'
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