Move docs to awscli/doc

So we can include it as package_data
Update help to read from awscli/doc

Verified this works with pip
Merge branch 'absolute-path' into develop

* absolute-path:
  Update help to read from awscli/doc
  Move docs to awscli/doc
Bump version to 0.8.1
Merge branch 'release-0.8.1'