Renamed Climate references to Blazar in the docs

References to climate in the docs have been renamed to blazar reflect the new name and enable uploadig docs to readthedocs. Also updated the docs to reference the new architecture image.

Change-Id: I594849afb6268892a03cc716a1707dcde835fa52
Closes-Bug: 1324581
Merge "Renamed Climate references to Blazar in the docs"