title: Visual Studio 2010, how to build projects in parallel on multicore
body: <p>I have a big solution with more than 40 projects. Almost half of them are test projects. 
  In my project we use both Code Contracts, Code Analysis, Style Analysis. 
  I want to be able to build the projects that are not dependent in parallel on my quad core CPU. </p>
  
  <p>How can I setup msbuild to build the projects in parallel?</p>