Support inflection of adverbs

[grhoten]

We should be able to inflect adverbs. For example, in English, I may have the phrase "The ${device} is on". The word "on" is an adverb, and it's static in English. In a language like French, it can have the following forms:

	singular	plural
masculine	allumée	allumées
feminine	allumé	allumés

The choice of adverb depends on the grammatical properties of ${device}.

[BrunoCartoni]

Technically, it's an adjective (at least in French) ;-)

[grhoten]

That's a good point. That's a difference between English and French. Apparently I don't have the need to inflect adverbs at this time. The adjective inflection issue is here: #13

Maybe this issue can be a lower priority.