Added the ability to save RAMPZ and EIND registers (Atmega2560 has it)
Merge branch 'master' of https://github.com/carlosdelfino/DuinOS

Conflicts:
	arduino.DuinOS/DuinOS/port.c
Added specific FreeRTOSConfig***.h files that where missing in the last update
repaired portSAVE_CONTEXT() for atmega2560
was missing a push over r0
Merge pull request #4 from niesteszeck/master

repaired portSAVE_CONTEXT() for atmega2560