Explicitly require locales to include them in Browserify build

[jfresco]

As proposed here: moment/moment#2007 (comment)
Closes DemocracyOS/democracyos#1039

[gvilarino]

Any chance you use require-all for this? Not sure if it will work (depends on how browserify does) but it would definitely be awesome if you don't have to touch that file again every time you add/remove a language file.

[jfresco]

@gvilarino Yes, it is possible. But, on the other hand, we are now putting in the bundle (app.js) all the languages that the app supports. If we do a require-all, we will also include all the languages that the app doesn't supports.
It's a trade-off between making the app.js bigger or the app more maintainable.
Opinions?

[mjlescano]

We should think of a way for not delivering all the translations; too much size 🍰

[jfresco]

@mjlescano Agree. It's not straightforward to do it with Browserify, as it puts in the bundle the modules that are explicitly required.