Added longer IO symbols, DIP version of 16F54, footprints and tools dirs.
Corrected footprint. Microchip's SSOP-20 devices use the odd 5.3mm body width, wider than the standard 4.4mm but narrower than the wide 6.1mm. JEDEC MO-150 uniquely identifies SSOP at 5.3mm, and MO-150-AE indicates the 20-pin version.
Added footprint for MO-150-AE (SSOP-20 with 5.3mm body width).