Merge pull request #109 from dbickson/master

first working version of adpredictor
Update svdpp.cpp
Merge pull request #110 from jianpingjwang/master

Update svdpp.cpp
Enable use of implicit data in WALS
Merge pull request #111 from okurisama/master

Enable use of implicit data in WALS
Merge pull request #112 from dbickson/master

forget to check in adpredictor makefile
fixed bug in jacobi