clean up test_vtimer_msg

replace tabs with spaces
break long lines
additional debug message
Merge pull request #68 from LudwigOrtmann/test_vtimer_msg_cleanup

clean up test_vtimer_msg
expand test case to print vtimer_now
Merge pull request #69 from mehlis/vtimer-now-fixes

expand test case to print vtimer_now
Fix sixlowpan app