Add histogram rollup merge tests; Fix method names
Merge pull request #210 from lakshmi-kannan/bf_histogram_rollup_fixes

Add histogram rollup merge tests; Fix method names
Refactor QueryStringDecoderAndRouter
Merge pull request #211 from chinmay-gupte/chinmay/refactor_QueryStringDecoderAndRouter

Refactor QueryStringDecoderAndRouter.