Create wALS
Merge pull request #4 from jian--huang/master

Create wALS
Create readdata.m
Create u1.base

Sample MovieLens data.
Update KUNN.m

optimize calculation of similarity
Merge pull request #5 from beigerice/master

Merge pull request #2 from angelleng/master
Merge pull request #3 from angelleng/master

merge