Test function of setting bit 7 in status register to Pause/Resume clock on Vcc

[sleemanj]

checkAlarms pauses to avoid race condition, pause is accomplished by flip bit 7 in control register (0x0E), datasheet indicates only stops clock on battery, shoudl test to see if flip bit 7 in status register (0x0F) accomplishes pause when on Vcc.

See #20