returnbody test for crdts
extract map stuff from crdtloader to crdtloader::maploader
refactor how we load individual CRDT types
simplify nil checking for values
implement returnbody vivification
add stubs for loader call during operation
actually ask for return_body :facepalm:
smaller pyramids in crdt loader hierarchy
Merge pull request #179 from basho/bk-default-returnbody

CRDT operations should returnbody by default, and vivify that body

Reviewed-by: seancribbs