convert into host byte order in UDP reception
udp_packet_handler uses printf, stack must be bigger
fix copy&paste typo
moved stack from header to C file
another NTOHS was missing...
remove vtimer object before (re)scheduling it
fix the bloody longterm vtimer bug

You know who you are, I'm looking at you!
add license header
fix grammar in license header
fixed warnings in vtimer
Merge pull request #347 from OlegHahm/destiny_fixes

UDP reception, stack sizes and typos
Merge pull request #374 from LudwigOrtmann/vtimer_fix_longterm

fix the bloody longterm vtimer bug