sphinx-issues does not declare whether it is parallel read/write safe

[jfinkels]

Running sphinx-build with the -j option for parallel builds causes the following warning.

WARNING: the sphinx_issues extension does not declare if it is safe for parallel reading, assuming it isn't - please ask the extension author to check and make it explicit

Here is the relevant information in the Sphinx documentation: http://www.sphinx-doc.org/en/1.5.1/extdev/#extension-metadata

[sloria]

Done! Thanks for reporting this. I'll cut a hotfix release shortly.

[jfinkels]

Cool!