Add basic IE support and better manage node content translation.

[clochix]

Add some tests in order to not throw exceptions in IE;

If a node as children, replace the content of the first textNode among them by the translation.

"Monsieur le Crétin des Alpes, vous serait-il possible d'intégrer dans un proche avenir les menues modifications que je viens d'effectuer avec mes humbles moyens sur votre géniale bibliothèque"

[fabi1cazenave]

Your patch looks good, thanks! Before I can land it I’d need:

• more information on the supported browsers (I guess IE6/7 aren’t supported, right?)
• this B2G/Gaia pull request to land — that’d be easier.

In a perfect world, I’d love to have a “clean” code that works OK on IE9+ and modern browsers, plus a specific “dirty” code that overrides the “clean” one for IE6/7/8 — I usually put the “dirty” code in a section like:

if (window.attachEvent) { // IE<9 only
  window.attachEvent("load", function() {
    /* dirty code comes here */
  });
)

… but that could be in another patch. Thanks again for your improvements!

Le crétin des Alpes te salue bien bas.

[fabi1cazenave]

FTR, following our IRC conversation: this patch should enable IE8+ support.

For IE6 and IE7 we’ll have at least to have a .querySelectorAll shim (e.g. sizzle / jQuery or qwery.js).