* optionally skip parsing responses to R6 objects
* parse -> .parse
* scope .parse to endpoints that return data
* move handling of .parsed so that it applies to both primitive and non-primitive return types
* try, try, again
* [R client] better support for binary/compressed responses
* cleanup
* revert change after PR review
* update samples
* fix R tests
* move private api methods to api-client, revert breaking method name change
