Initial argument validation implementation
Types transition
Working project operator.  Update to ASM 4.1
Working Project merge build
Pom version cleaning and updates.
Initial working filter operator
Add workspace field and function setup support.
Add alternate function
Add slightly better filter test.
Updates to support SelectionVector removal
Merge VV copy from execwork
Remove logging fields from annotations.  (Okay with 1.7u9, not with 1.7u21)
Merge branch 'execwork' of https://github.com/jacques-n/incubator-drill into HashToRandomExchange
Implememnt HashSender support; including the evaluator, record batch and code gen template