changed in ccnl-core.c all DEBUGMSG to use the symbolic constants (INFO, TRACE etc).
I removed in DEBUGMSG the printing of fct name, file and line number because
the output became too cluttered. If developers need that info, they better
have to force this and to insert the TRACEIN() and TRACEOUT() macros.
macro NEEDS_PACKET_CRAFTING now also inserted/defined in the utilities
ccn-lite-simu.c converted to use the new DEBUMSG level constants
Merge branch 'dev-master' into dev-basil