PowerWatch Rev F changes

[adkinsjd]

• Fix R1 to be 66.5K
• Fix voltage monitor/watchdog resistor divider
• Add a way for the particle to manually actuate a hard reset (because apparently system.reset doesn't work?)
• Add a way for the RTC to trigger a particle wakeup from deep sleep
• Move things off of D7 to save that power
• Add the PPS line for phase measurement