* introduced dummy function for msp-430 config-save
* moved sysconfig from board to core
[sys/transceiver cpu/]
* moved some buffer size defines to cpu dependent parts
* some cleanups
* increased main priority to the half of maximum priority
* introduced define for minimum stack size
* decreased stack size for uart0 thread
* merged commands for rtc shell module to one command (date)
* cleanup of header includes