Added buffer management in InputTextFile

include/Field.h

include/InputText.h

include/InputTextFile.h

include/MemoryBuffer.h

include/PartOfPacket.h

packetlib.bbprojectd/bulgarelli.bbprojectsettings

src/ConfigurationFile.cpp

src/File.cpp

src/InputTextFile.cpp

src/MemoryBuffer.cpp

src/Packet.cpp

src/PacketHeader.cpp

src/PartOfPacket.cpp

src/SDFBlockFixed.cpp

src/SDFBlockVariable.cpp

src/SDFRBBlock.cpp