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* add gender() to select the gender of singular pronouns
* replace short named methods with longer methods. shorted method now print a message and raise DecrecationWarning
pl -> plural
plnoun -> plural_noun
plverb -> plural_verb
pladj -> plural_adjective
sinoun -> singular_noun
prespart -> present_participle
numwords -> number_to_words
plequal -> compare
plnounequal -> compare_nouns
plverbequal -> compare_verbs
pladjequal -> compare_adjs
wordlist -> join
* change classical() to only accept keyword args: only one way to do it
* fix bug in numwords where hundreds was giving the wrong number when group=3