Minhash now working
Adding notebooks for HW2
dded "Checked" on hws already checked.
 Added HW2 collection
reaidg through
Checked some of the HW2 notebooks
 added missing grade.
Added Vineel Pratap's notebooks
more changes
Merge branch 'master' of https://github.com/yoavfreund/UCSD_BigData
Merge branch 'master' of https://github.com/zeynepsu/UCSD_BigData