Arduino Power Outage Monitor 1.2.9

Use scoped constants for MCP9800 library.
Fix "may be used uninitialized" warning.

Arduino Power Outage Monitor 1.2.7

Remove code that calculates sunrise and sunset; use JC_Sunrise library instead,
https://github.com/JChristensen/JC_Sunrise

Arduino Power Outage Monitor 1.2.5

Include newer Time library (TimeLib.h).

Arduino Power Outage Monitor 1.2.4

Bugfix: Clear the PCIF2 interrupt flag properly.
See issue #1.

Arduino Power Outage Monitor 1.2.3

Documentation update.