docs(guide/uk,ru): Multiple translation ids

Add docs about multiple translation ids to Ukrainian and Russian versions of the guide
docs(guide/uk,ru): Remove deprecated docs for default interpolation

Removes deprecated docs about default interpolation from Ukrainian and Russian versions
of the guide.
docs(guide/uk,ru): Replacement text in error handler

Adds info about default replacement text in custom error handler to Ukrainian and Russian
versions of the guide.
fix(translateInterpolator): make it work with 1.3-beta

this commits fixes a bug that was introduced with angularjs 1.3-beta-6
it ensures that there's always at least an empty object for interpolate
params
Performance improvement by limiting calls to localStorage.getItem().
feat (loaders): enable loaders cache

It useful if we disable cache in our project (for dynamic content), but want enable it for translation files (static content).
Also it useful if we need include translation into build file (cache in advance for production).

app.run(function($translationCache) {
    $translationCache.put('/compiled/module1/locals/en.json', '{"MODULE1.HELLO":"Hi!"}');
    // Other translations string added by Grunt
});
In conclusion, we never need uncached translations, because it is fixed content.
Merge branch 'canary' of github.com:angular-translate/angular-translate into feature/enable-cache
merge