docs: update index page.
docs: Modify generate providers table script to support detection of deploy_node
feature.
docs: Update getting started and examples page.
Add sheband, make sure parent directory is always in sys.path.
Update invalid docstring.
Modify tox docs environment to generate documentation fixture before
building the docs.
Use absolute path and generate links tags for both fixtures.
Fix docs build issues.
Don't treat warnings as errors, output docs to _build/html.
Use python2.7 when generating docs.