Update requirements.txt (dotnet#1483)

danroth27 · web-flow · commit b4f5bb3e9720 · 2016-06-23T22:16:01.000-07:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,4 +1,5 @@
 Sphinx==1.4.1
 sphinx-rtd-theme
+sphinx-autobuild
 git+git://github.com/danroth27/yasfb-py3
 git+git://github.com/rtfd/sphinxcontrib-dotnetdomain
