Revert "Mark lib as post-0.16.0 format."

This reverts commit 33bb81f5967d5c551179adfef5b55be1cd0a2567.

bower.json

@@ -20,7 +20,7 @@
     ],
     "private": false,
     "dependencies": {
-        "amber": ">0.16.0",
+        "amber": ">=0.15.0",
         "amber-contrib-web": ">=0.3.0",
         "jquery-ui": ">=1.9.2",
         "codemirror": "^5.10.0",