title: TsLint ignore files or don't run when opening file
body: <p>I have Visual Studio 2013 (update 2) with Web Essentials 2013. </p>
  
  <p>Every time I open files like lib.d.ts, TsLint starts to run and takes a long time to then finally spam my messages full. I don't want any messages telling me to fix stuff in files that aren't mine.</p>
  
  <p>Is it possible to exclude these files? Or at least stop TsLint from running every time I open a file? Or tell TsLint not to run on files that aren't in my solution?</p>