Some pages are getting their own hash / build bundle (probably demos included in build?)

[michaelpb]

Minor bug, just causing unnecessary JS asset requests on first load:

Generally there should be only one bundle being created -- everything should be deterministic. However some pages are getting different hashes. Likely it's the demos, but there could be other stuff getting included in the builds by accident.

Example:

michaelb@arfour:~/projects/modulojs.org/build$ ag modulo-build-xx5eumec.js
docs/templating/index.html
2336:</div><script src="/_modulo/modulo-build-xx5eumec.js"></script>
michaelb@arfour:~/projects/modulojs.org/build$ ag modulo-build-x117b2qc.js
docs/lifecycle.html
740:</div><script src="/_modulo/modulo-build-x117b2qc.js"></script>
michaelb@arfour:~/projects/modulojs.org/build$ ag modulo-build-x13nf6dk.js
docs/templating/tags.html
3060:</div><script src="/_modulo/modulo-build-x13nf6dk.js"></script>