Option to update PlexPy automatically

data/interfaces/default/settings.html

@@ -85,6 +85,12 @@
                             <p class="help-block">If you have Git installed, allow periodic checks for updates.</p>
                         </div>
                         <div id="git_update_options">
+                            <div class="checkbox">
+                                <label>
+                                    <input type="checkbox" id="plexpy_auto_update" name="plexpy_auto_update" value="1" ${config['plexpy_auto_update']}> Update Automatically
+                                </label>
+                                <p class="help-block">Update PlexPy automatically if an update is available when checking for updates.</p>
+                            </div>
                             <div class="form-group">
                                 <label for="git_token">GitHub API Token</label>
                                 <div class="row">