Merge pull request #37 from lochana/master

stubs removed
getFeaturenames() method added
Merge pull request #38 from SupunS/master

getFeaturenames() method added
getSamplePoints method modified
Merge pull request #39 from SupunS/master

getSamplePoints method modified
Changed return type of getSamplepoints()
Merge remote-tracking branch 'upstream/master'
Merge pull request #40 from SupunS/master

Changed return type of getSamplepoints()
Singleton database handler
Merge pull request #41 from SupunS/master

Singleton database handler
explore data