title: NuGet package files not being copied to project content during build
body: <p>I am building an MVC4 web application with VS2012 professional with NuGet Package Manager version 2.2.31210.  I have multiple projects in my solution, all sharing various packages I installed using NuGet.  One of my projects is an MVC4 web application where I am using packages such as bootstrap, jquery UI, etc, all installed using NuGet.</p>
  
  <p>When I clone a fresh copy of my entire solution from my repository and build my MVC4 project, the package restore feature seems to be working: it creates the packages directory under the solution direcotry and populates it will all the versions of the packages I expect to see.  However, the content files do not get copied to the appropriate places in the MVC app directory.  The weird thing is that it does create directories for the content, but does not copy the content files themselves.</p>
  
  <p>For example, I am using the Twitter Bootstrap package which appears in the packages/Twitter.Bootstrap.2.2.2.  In the MVC project a directory called bootstrap (containing css, img, and js directories) gets created in the Content directory. But, no css or js files are copied into those directories!</p>
  
  <p>Does anyone have a clue what magic incantation I must utter to get the build to copy these content files from the NuGet packages directory?</p>