According to the require.js documentation, if you are using "require" in HTML,
then the data-main attribute should not be used.
http://www.requirejs.org/docs/api.html#data-main
So merged main.js into converse.js, which appears to solve the problem.
Strophe.ping.js was still in the no-dependencies build
Also clean up wrapper-end.js a bit as well as the grouping of dependencies in
non_amd.html
Remove locales from utils.js and include it in converse.js so that the locales
can more easily be removed from the build.