Added html tag module for template rendering

Author: gorriecoe

composer.json

@@ -17,7 +17,8 @@
   "homepage": "http://github.com/gorriecoe/silverstripe-embed",
   "require": {
     "silverstripe/framework": "^4",
-    "unclecheese/display-logic": "^2"
+    "unclecheese/display-logic": "^2",
+    "gorriecoe/silverstripe-htmltag": "^1.0"
   },
   "extra": {
     "installer-name": "embed"