Add other forms for French imperative

[callumjethomas]

It seems like the current French model only includes the second person plural for the imperative:

e.g.

verb = conjugator.conjugate("parler")
verb['Imperatif']['Imperatif Présent']
OrderedDict([('', 'parlez')])

However, as you will see here, French verbs can be conjugated in three ways in the imperative:

	présent
	–
(tu)	parle !
	–
(nous)	parlons !
(vous)	parlez !
	–

Is it possible to add these other two forms (second person singular and first person plural)?