Note that the Project Resource is almost finished and what's left
Edit Project resource to include new actions, fix typos, explain merge

* The Project resource now have explicit unarchive and bulk unarchive
  actions. This is because these actions significantly affect the
  state of the project and rather than have consumers guess at
  the result of an API call, it makes more sense to have the consumer
  explicitly state what they want to accomplish with the API call.
  * This is particularly important in batch scripts, where calling
    a "toggle" action could lead to accidental archival/unarchival
Add diagram to explain how Project merging works.