Fixed the createdAt, createdBefore, and createdAfter parameters for the Signatures resource
Removed case sensitivity from title and body parameters
Added city, state, zip, and country parameters to the Signatures resource

	modified:   modules/custom/api_petitions/api_petitions.module
	modified:   modules/custom/petitions_data/classes/ISignaturesRaw.class.inc
	modified:   modules/custom/petitions_data/classes/PetitionsIndexBase.class.inc
	modified:   modules/custom/petitions_data/classes/SignaturesBase.class.inc
	modified:   modules/custom/petitions_data/classes/SignaturesMongoRaw.class.inc