Revised documentation relevant to SourceForge patch #100837 (simplify making HTTP POST requests).
Revised documentation relevant to SourceForge patch #100837
(simplify making HTTP POST requests).

Added documentation of URLopener.version and how it can be overridden.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator