docs(api): v1 endpoint updates (#73)

* docs: move some notes to a more relevant location

* docs(api): add getbestblockheight core grpc

* docs(api): deprecate getmnlistdiff in favor of subscribetomasternodelist

* docs(api): add subscribetomasternodelist

* docs(api): update previous version link

* docs(api): add missed changes

* docs(api): remove outdated grpc info and update links

* docs(api): add grpcui example

* docs(api): rewording

* docs(api): add some contestedresource endpoints

* chore: update ids in examples

DPNS no longer has a usable identity id so it was removed from examples

* docs(api): mark getproofs disabled for external use

* docs(api): use version number consistently

* docs(api): update several notes and descriptions

* docs(api): add getContestedResourceVotersForIdentity

* docs(api): getContestedResourceVoteState

* docs(api): add endpoints and update overview

* docs(api): add remaining v1 endpoints

* docs(api): base64 info

* docs(api): add getTotalCreditsInPlatform

* chore: update deprecation notices

Author: thephez