Updated dispatch-common-* javadoc.
Updated dispatch-rpc-client javadoc.
Updated dispatch-rpc-server-* javadoc.
Updated dispatch-rpc-shared javadoc.
Added distapct-rest javadoc.
Reintroduced ResponseWrapper
removed mention of extension points. Added link to wiki on how to write services.
removed mention of extension points in rpc-dispatch.
Typo
Merge pull request #355 from ArcBees/cv_dispatch_javadoc

Dispatch documention