- RTOS - fix stack for K64F, nrf52 armcc, nrf51
       - main thread stack checking enabled
	   - fix heap limit checking and make memory regions explicit
- deprecate macro - add since argument
- override new and delete operators to trap errors
- Maxim - i2c and dac bugfixes
- STM - STM32F4 - serial flow enablement, enable async serial
      - pwm and analog definition clean-up
- Nordic - NRF51 - fix for overflow in the ticket