new: dev: Added locales for moment.js.

Note: I had to patch moment.js ES locale:

From

    longDateFormat:{LT:"H:mm" ...

To:

    longDateFormat:{LT:"h:mm A" ...

Puff...
fix: dev: Had to patch Dygraph library as the x label in the legend is always suffixed with ":" and setting the valueFormatter doesn't help.
fix: dev: Fixed legend rendering and now timestamp is formatted locale-aware.