Splash screen "Loading..." text should be internationalized

[samreid]

Splash screen "Loading..." text should be internationalized. In the future, we may replace it with an animation, but for now it is in text. I don't think our normal translation procedure will work here if the splash screen is shown before requirejs loads. (I could be wrong about that, or we could split into two requirejs load phases). Here is the Norwegian "nb" translation for Loading...:
"Loading..." -> "Laster..."

[samreid]

This relates to i18n, so I'll assign to @pixelzoom and/or @jbphet.

[pixelzoom]

I think we should move towards a splash screen that doesn't involve words. Especially since we can't use our normal process for loading strings until requirejs loads.

[pixelzoom]

I'm going to put this issue on the agenda for discussion at the next developer meeting. I don't think any work should be done on this, and a wordless splash screen (preferably with animated logo) should be designed and implemented instead.

[samreid]

I've looked into an animated splash screen in #68, but prospects seem dismal for showing an animation while js initialization code is running. We may be able to show an animation while the code is downloading--however, that is a significantly smaller fraction of the time here in the states. Another alternative is to delay the initialiation of the sim until the animation has played, but IMO we should be pushing for faster launches not slowing them down intentionally.

[pixelzoom]

Discussed at 10/9/14 dev meeting. Consensus was that we should strive to remove text from the splash screen. But defer this issue until we decide how translated sims will be built and delivered.

[ariel-phet]

It appears that #348 will be a successful strategy for showing a progress bar, so we will eventually remove any text that says "Loading" since a progress bar will give an iconic representation of that text. Closing