Grégoire Henry authored Apr 16, 2018 and Benjamin Canou committed Jun 06, 2018

- start using `GET` and query parameters instead of `POST`  when
  meaningful

- inline parsed protocol data and metadata in block headers

- inline parsed protocol data and metadata in operations

- split the RPC in four categories:

  - static data, available explicitly in block headers and operations

  - static "metadata", information that were computed while validating
    a block or an operation, but which are not explicit in the block
    header (e.g. the baker of a block, the list of internal
    transfer... (currently not implemented, but that's WIP))

  - "context" all the static data we may read in the context
    (contracts balance, list of delegates, ...)

  - "helpers" are some RPC that may perform some computation.