rewrite thunk generator to work with new, more descriptive signatures
rewrite thunk generator to work with new, more descriptive signatures

 * maintains backwards-compat with old-style sigs
 * works directly with sig FIAs
 * uses PCRE

youprofit/parrot,parrot/parrot,gagern/parrot,parrot/parrot,gitster/parrot,FROGGS/parrot,youprofit/parrot,tkob/parrot,FROGGS/parrot,parrot/parrot,youprofit/parrot,gagern/parrot,parrot/parrot,gitster/parrot,tkob/parrot,tkob/parrot,FROGGS/parrot,FROGGS/parrot,gagern/parrot,youprofit/parrot,tkob/parrot,FROGGS/parrot,youprofit/parrot,tkob/parrot,gagern/parrot,parrot/parrot,FROGGS/parrot,gagern/parrot,youprofit/parrot,gitster/parrot,gitster/parrot,youprofit/parrot,tkob/parrot,gitster/parrot,tkob/parrot,FROGGS/parrot,gagern/parrot,FROGGS/parrot,youprofit/parrot,gagern/parrot,gitster/parrot,tkob/parrot,gitster/parrot