Change license to "W3C" because webcomponents.org seems to balk otherwise.

Author: prushforth

bower.json

@@ -6,7 +6,7 @@
     "Maps for HTML Community Group"
   ],
   "homepage": "http://maps4html.github.io/Web-Map-Custom-Element/",
-  "license": "W3C SOFTWARE AND DOCUMENT NOTICE AND LICENSE",
+  "license": "W3C",
   "keywords": [
     "web-components",
     "polymer",