Replace the 'NOTE' and 'TODO' words with
the note and todo directives in the Compute API guide.
Improve some format in the guide.
e.g. Fix unnecessary bold characters.
Change-Id: I7e9d6b8a5228886fd5de03d12482481d2b652666
Closes-Bug: #1558459
To help add color to the API doc, we use a common set of persona when
talking about the use cases behind each API.
This is really just a quick sketch that adds TODOs for others to follow
up on, in order to complete the guide.
blueprint complete-todo-in-api-concept-doc
Change-Id: I71a07caa27f1b17d3256a5439e867c40fc9d0abd