Add browserified and minified JS files for bower registration.

bower.json

 {
   "name": "markdown-it-imsize",
-  "version": "0.1.0",
+  "version": "1.1.0",
   "authors": [
     "tatsy <tatsy.mail@gmail.com>"
   ],
@@ -16,6 +16,8 @@
     "node_modules",
     "bower_components",
     "test",
-    "tests"
+    "helpers",
+    "Makefile",
+    "index*"
   ]
 }