first facet skeleton (os and debug)
first commit of debug facet for NS-3
add makefile and shell scripts to build NS-3 in Wiselib
add makefile and shell scripts to build NS-3 in Wiselib (forget push Makefile and ns3_types.h)
update debug facet and add timer facet
add ns3_timer.h file to timer facet
Merge pull request #44 from dizhizhou/master

Pull request: GSoC'13 Wiselib NS-3 Port -- os, debug and timer facets