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().
Merge branch 'feature/enable-cache' of github.com:tamtakoe/angular-translate into feature/enable-cache