Fix windows optional prerequisites

@@ -14,7 +14,6 @@ Prerequisites
 
 - PhantomJS_ 1.8.2 or greater. Installation instructions can be found `here <http://phantomjs.org/download.html>`_
 - Python_ 2.6 or greater for ``casperjs`` in the ``bin/`` directory
-- .NET Framework 3.5 or greater (or Mono_ 2.10.8 or greater) for ``casperjs.exe`` in the ``bin/`` directory
 
 .. versionadded:: 1.1
 
@@ -152,9 +151,13 @@ Colorized output
 
    Windows users will get colorized output if ansicon_ is installed.
 
-
 .. index:: Bugs, REPL
 
+Compilation (Optionaly)
+~~~~~~~~~~~~~~~~~~~~~~~
+
+- .NET Framework 3.5 or greater (or Mono_ 2.10.8 or greater) for ``casperjs.exe`` in the ``bin/`` directory
+
 Known Bugs & Limitations
 ------------------------