Remove Guava usage from GWT code
Remove carstore
Warn if HEAD or GET has body or form params
Merge pull request #647 from ArcBees/cv_rest_generators_v2_p21

Part 21: Warn if HEAD or GET has body or form params
Merge pull request #646 from ArcBees/cv_rest_generators_v2_p20

Part 20: Remove carstore
Merge pull request #645 from ArcBees/cv_rest_generators_v2_p19

Part 19: Remove Guava usage from client code