Added ground symbol to LockBox.lbr
Modified the ATMEL chip schematic in LockBox.lbr, the schematic now
updates properly when adding attributes to the port/pins in
LockBox.sch.
Finished the powersupply and LDO portion of the LockBox.sch,
Added pwr/gnd and bypass cap to the ATMEL chip, updateded
I2C pin attributes and added I2C bus.