title: Missing project sub type error when trying to create a new MonoGame project
body: <p>Hello Im using Visual Studio 2012 and whenver I try to create a new MonoGame content project I get this error...Also if I try to start a windows Mono project or a Android mono project I dont get the same error but whenever i try to compile i get errors, i have unstillaed Mono and xamarin and tried installing and that never solved the issue the only thing left to do is uninstall Visual Studio 2012 but that can take a ton of time so if anyone here can help me it will be appreciated here is the link to the following error.</p>
  
  <p><img src="https://i.imgur.com/JbKLnDW.jpg?1" alt="Error screenshot"></p>