added Segger J-Link connections
updated projects
fix for interrupted low power timer. Still having issue with task time stretched if interrupts happening frequently. Need to compensate for the lost timer time.
updated tickless mode for LPTMR
added support for Maxim DS1342 RTC
enhanced low power project
new project with DS1342 RTC and level shifter for NeoPixels
merged changes from Tom D., and checking for tick counter underflow. Functions ok, except that for a 10ms tick period without idle time interruption there are two unnecessary tick interrupts happening.
fixed redundant ticks at the beginning of a new tickless idle period.