Removing the pointer generator for primitive types

Having two generic methods with the same name causes compiler errors.
Type erasure in scala removes information about generic types.

#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
Fixing two test cases in GpuFilteredRDDSuit after refactoring.

Major Gpu operations are now in GpuPartition and not in GpuFilteredRDD
anymore. So all the test cases should be adjusted accordingly.


#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
Updating a few test cases for GpuFilteredRDD

#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
fixing bus in one of the testcases
#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
Adding a note for fixing String column data later
#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
Adding a function to return the appropriate column based on its index
#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
Adding a class and an enum for comparissons in selections

#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14
[unstable] Adding a function do generic filter operation on data.


#14: Refactor GpuFilteredRDD and FilteredChunkItrator 

Task-Url: http://github.com/meisam/spark/issues/issue/14