Merge pull request #66 from lochana/master

10_24_2014_9_20AM
User login implemented
Merge pull request #67 from SupunS/master

User login implemented
10_24_2014_4_14PM
10_24_2014_4_17AM
10_24_2014_4_30AM
10_24_2014_4_35PM
add logistic regression class
log regression deleted