DOC: invocation.rst: sphinx-apidoc -M option

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branch : westurner/doc-invocationrst-sphinxapidoc-m-option-1413253549167
Merged in westurner/sphinx-1/westurner/doc-invocationrst-sphinxapidoc-m-option-1413253549167 (pull request #308)

DOC: invocation.rst: sphinx-apidoc -M option