title: having errors installing appcompt in Xamarin studio
body: <p>errors installing appcompt in Xamarin studio:</p>
  
  <blockquote>
    <p>Package 'Xamarin.Android.Support.Compat.24.2.1' does not exist in project 'ServerLandNews'
    Package 'Xamarin.Android.Support.Compat.24.2.1' does not exist in folder 'C:\Users\PRINCESO\Documents\Projects\ServerLandNews\packages'
    Could not install package 'Xamarin.Android.Support.Compat 24.2.1'. You are trying to install this package into a project that targets 'MonoAndroid,Version=v5.1', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.</p>
  </blockquote>