avrdude.conf.in: Change all programmers' pin definitions to 0-based
avrftdi.c: incorporate new 0-based pindef infrastructure
avrftdi_private.h: Add pin_checklist_t to avrftdi_t for runtime pin
checking in pgm->setpin.
git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk@1164 81a1dc3b-b13d-400b-aceb-764788c761c2