Fix IE9 reordering HTML attributes in the key.

[maxpeterson]

It seems that ie9 reorders some attributes this causes the key not to match.

For example <span title="The title" class="test">Test</span> will be rendered as <span class="test" title="The title">Test</span> by ie9. The result is that the key does not match the value when looked up by the directive.

The fix very similar to #131

[maxpeterson]

@rubenv should I have created a test for this? Do you have any way of automating IE tests.

[rubenv]

I would love to have automated IE tests, but we sadly don't have them yet.

Any help there would be greatly appreciated.

For now I test all changes through our main project that heavily uses angular-gettext. For that one we have a full CI setup (with tons of browsers). Unfortunately I can't use it for open-source purposes (who would pay the bills? :-)).

[rubenv]

As for this patch, I'll test it, if it works it's good to go in.

[rubenv]

Merged! Thanks a lot!

[rubenv]

Tagged as "v2.0.2"

[maxpeterson]

Thanks