added tilepieces

Tilepieces is an open source project to visually editing HTML documents and Web applications projects

Author: dinuovos

doc/realworld.html

@@ -180,6 +180,7 @@ <h2>CodeMirror real-world uses</h2>
       <li><a href="https://textbox.io/">Textbox.io</a> (WYSIWYG rich text editor)</a></li>
       <li><a href="https://thefiletree.com">The File Tree</a> (collab editor)</li>
       <li><a href="http://www.mapbox.com/tilemill/">TileMill</a> (map design tool)</li>
+      <li><a href="https://tilepieces.net">Tilepieces</a> (visually editing HTML documents and Web applications projects)</li>
       <li><a href="http://doc.tiki.org/Syntax+Highlighter">Tiki</a> (wiki CMS groupware)</li>
       <li><a href="https://www.tistory.com">Tistory</a> (blog service)</li>
       <li><a href="http://www.toolsverse.com/products/data-explorer/">Toolsverse Data Explorer</a> (database management)</li>