Change license from LGPL to BSD-v2 only for .cpp files.

src/CMakeLists.txt

src/command/command.cpp

src/command/value.cpp

src/debug/contiifstream.cpp

src/debug/debug.cpp

src/dgraph/entity.cpp

src/dgraph/factory.cpp

src/dgraph/pool.cpp

src/exception/exception-abstract.cpp

src/exception/exception-factory.cpp

src/exception/exception-signal.cpp

src/exception/exception-traces.cpp

src/signal/signal-array.cpp

src/signal/signal-cast-helper.cpp

src/signal/signal-caster.cpp

src/traces/tracer-real-time.cpp

src/traces/tracer.cpp