Update readme and EOL conversion for windows install

I had some trouble installing the virtual environment on Windows 8 and want to share some notes. I added a .gitattributes file to ensure windows didn't convert the EOL characters to the Windows style. I also added a note that ensured symlinks could be added to the Windows Shared folder of Vagrant.
I think there's a typo here. Looks like "download" but I still don't fully follow