Added LICENSE header to each file

Porthos/src/AESObject.cpp

Porthos/src/AESObject.h

Porthos/src/EzPCFunctionalities.cpp

Porthos/src/EzPCFunctionalities.h

Porthos/src/Functionalities.cpp

Porthos/src/Functionalities.h

Porthos/src/ParallelAESObject.cpp

Porthos/src/ParallelAESObject.h

Porthos/src/connect.cpp

Porthos/src/connect.h

Porthos/src/ezpc.h

Porthos/src/globals.h

Porthos/src/secondary.cpp

Porthos/src/secondary.h

Porthos/src/tools.h