Using servermanager.[xxx].proxy for pydoc help generator

[xxx] being one of ['filters', 'sources', 'writers', 'animation']

Change-Id: I9e5ee6faa9b84d692277087be3a7d47580f17ff0
autofunction instead of autoclass

Removed hack to disable generation of doc pages for certain proxies

Change-Id: I6ae91f76a6e11977cf74375cc9602cf58ae03e81