make getLastRowIndex return 0-based index
make getLastRowIndex return 0-based index

AgDude/ng-grid,InteractiveIntelligence/ng-grid,angular-ui/ui-grid,mportuga/ui-grid,ntmuigrid/ntmuigrid,Servoy/ng-grid,angular-ui/ui-grid,InteractiveIntelligence/ng-grid,InteractiveIntelligence/ng-grid,Servoy/ng-grid,Servoy/ng-grid,AgDude/ng-grid,AgDude/ng-grid,mportuga/ui-grid,dbckr/ui-grid,ntmuigrid/ntmuigrid,angular-ui/ng-grid,angular-ui/ng-grid,dlgski/ui-grid,ntmuigrid/ntmuigrid,angular-ui/ng-grid,kamikasky/ui-grid,dbckr/ui-grid,dbckr/ui-grid,kamikasky/ui-grid,mportuga/ui-grid,angular-ui/ui-grid,kamikasky/ui-grid,dlgski/ui-grid,dlgski/ui-grid