Created CensusFormMappers and modified CensusFormFilter to use simpler logic.
Added getHeadOfHouseholdByHouseholdExtId() to Queries class.
Created FormPayloadBuilder class and specific instances for CensusActivity
Created CensusFormPayloadConsumers to consume form data coming back from forms
Modified Skeletor and CensusActivity implement FormBuilders/Consumers.
Merge branch 'NavigateActivityBranch' of github.com:USM-RCG/openhds-tablet into NavigateActivityBranch

Conflicts:
	src/main/java/org/openhds/mobile/projectdata/CensusFormFilters.java