Add note about vcvarsall.bat error (#26, closes #32)

README.rst

@@ -18,6 +18,11 @@ so you can install the latest release with ``pip install mwparserfromhell``
     cd mwparserfromhell
     python setup.py install
 
+If you get ``error: Unable to find vcvarsall.bat`` while installing, this is
+because Windows can't find the compiler for C extensions. Consult this
+`StackOverflow question`_ for help. You can also set ``ext_modules`` in
+``setup.py`` to an empty list to prevent the extension from building.
+
 You can run the comprehensive unit testing suite with
 ``python setup.py test -q``.
 
@@ -132,11 +137,12 @@ following code (via the API_)::
         text = res["query"]["pages"].values()[0]["revisions"][0]["*"]
         return mwparserfromhell.parse(text)
 
-.. _MediaWiki:            http://mediawiki.org
-.. _Earwig:               http://en.wikipedia.org/wiki/User:The_Earwig
-.. _Σ:                    http://en.wikipedia.org/wiki/User:%CE%A3
-.. _Python Package Index: http://pypi.python.org
-.. _get pip:              http://pypi.python.org/pypi/pip
-.. _EarwigBot:            https://github.com/earwig/earwigbot
-.. _Pywikipedia:          https://www.mediawiki.org/wiki/Manual:Pywikipediabot
-.. _API:                  http://mediawiki.org/wiki/API
+.. _MediaWiki:              http://mediawiki.org
+.. _Earwig:                 http://en.wikipedia.org/wiki/User:The_Earwig
+.. _Σ:                      http://en.wikipedia.org/wiki/User:%CE%A3
+.. _Python Package Index:   http://pypi.python.org
+.. _StackOverflow question: http://stackoverflow.com/questions/2817869/error-unable-to-find-vcvarsall-bat
+.. _get pip:                http://pypi.python.org/pypi/pip
+.. _EarwigBot:              https://github.com/earwig/earwigbot
+.. _Pywikipedia:            https://www.mediawiki.org/wiki/Manual:Pywikipediabot
+.. _API:                    http://mediawiki.org/wiki/API

docs/index.rst

@@ -22,10 +22,16 @@ so you can install the latest release with ``pip install mwparserfromhell``
     cd mwparserfromhell
     python setup.py install
 
+If you get ``error: Unable to find vcvarsall.bat`` while installing, this is
+because Windows can't find the compiler for C extensions. Consult this
+`StackOverflow question`_ for help. You can also set ``ext_modules`` in
+``setup.py`` to an empty list to prevent the extension from building.
+
 You can run the comprehensive unit testing suite with ``python setup.py test``.
 
-.. _Python Package Index: http://pypi.python.org
-.. _get pip:              http://pypi.python.org/pypi/pip
+.. _Python Package Index:   http://pypi.python.org
+.. _get pip:                http://pypi.python.org/pypi/pip
+.. _StackOverflow question: http://stackoverflow.com/questions/2817869/error-unable-to-find-vcvarsall-bat
 
 Contents
 --------