Added headers to avoid errors on compilation.

code/Assembly.cpp

code/Clustering.cpp

code/DoAssembly.cpp

code/Faster_HighDseg.cpp

code/HighDseg.cpp

code/LocalAlign.cpp

code/N_matchreads.cpp

code/S_HighDseg.cpp

code/Utilities.cpp

code/common.cpp

code/hugeBlock.h

code/vsKnownLib.cpp