moved debugging statements from header to c file

Additionally, declaring the stacks as static.
amendment - to be squashed
tests: add test that shows sequence of received messages
test_thread_msg_seq: add missing main() return statement
shell: accept UTF8 input
shell: don't ignore IO errors
shell: add myself to authors
Ensure that stack pointer is correctly aligned during thread creation on MSP430
Merge pull request #881 from rousselk/msp430-stackptr-align

Ensure that stack pointer is correctly aligned during thread creation on MSP430
Fixed an error in CC2420 register read function
Fixed errors in addresses/PAN setting functions
Merge pull request #877 from Kijewski/shell-utf8

shell: fix UTF-8 problem
Merge pull request #882 from rousselk/cc2420_driver_fixes

CC2420 radio transceiver's driver fixes
Merge pull request #817 from kaspar030/tests_msg_sequence

tests: add test that shows sequence of received messages
Merge pull request #792 from OlegHahm/etx_fixes

rpl: moved debugging statements from header to c file