Merge branch 'pre-existing-html-layout' of https://github.com/ebrehault/angular-schema-form into ebrehault-pre-existing-html-layout

Conflicts:
	dist/schema-form.js
	dist/schema-form.min.js

Author: davidlgj

dist/schema-form.js

@@ -1291,6 +1291,7 @@ angular.module('schemaForm')
                 slot = null;
               }
               if(slot) {
+                slot.innerHTML = "";
                 slot.appendChild(n);  
               } else {
                 frag.appendChild(n);