title: Updating NuGet package causes Source Control error because content files are not overwritten
body: <p>Quite often when installing some of the js* library packages nuget copies js files to Scripts directory of the web project and puts these files under source control.<br/>
  Yet while updating the package instead of just rewriting the files nuget first removes them and then copies new versions. Because of that TFS shows the error about conflicting state: Files are scheduled for removal but present locally.</p>
  
  <p>Can we somehow change this behavior or is it completely defined by the author of the package?</p>