+ATMEL. Crystal. PTH Electrolytic Caps

& conventions (in Readme)

+ Crystal component, HC-49 module
+ ATtiny13, ATmega328-Dip28, ISP6 components
+ PTH Electrolytic capacitors (inc. name correction)

ANOD and CATH pins renamed to A and C respectively, in both components
and modules.

Removed "Resistor-*" footprint filter from Battery component.