Updated Windows instructions.
Updated Windows instructions.

* subversion/bindings/swig/INSTALL
    added instructions for installing swig and configuring Visual Studio
    on Windows. Also moved all windows instructions into a separate 
    section.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion