Removed link to pre-build DLL for windows as they are outdated
Added doc for building C extension on windows
merged branch tucksaun/fix-doc-for-windows (PR #1186)

This PR was merged into the master branch.

Discussion
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Add doc for building C extension on windows

Commits
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12500b3 Added doc for building C extension on windows
a53c467 Removed link to pre-build DLL for windows as they are outdated
fixed markup