Add a way to get genindex file

[shimizukawa]

Original: sphinx-doc/sphinx#1003

When building my project with "make html", genindex.html is generated as expected.

How do I get WebSupport to return the index? websupport.get_document("genindex") returns a dictionary, but d["body"] == "".

websupport = WebSupport(datadir="...", search="woosh")
document = websupport.get_document("genindex")

# document["body"] == ""

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• Bitbucket: https://bitbucket.org/birkenfeld/sphinx/issue/1003
• Originally reported by: Bernt R. Brenna
• Originally created at: 2012-09-11T11:39:50.842