Correction to OffSpecular spelled out

Core/Simulation/OffSpecularSimulation.cpp

Core/Simulation/OffSpecularSimulation.h

...coregui/Views/InstrumentWidgets/OffSpecularBeamEditor.cpp

GUI/coregui/Views/InstrumentWidgets/OffSpecularBeamEditor.h

...i/Views/InstrumentWidgets/OffSpecularInstrumentEditor.cpp

...gui/Views/InstrumentWidgets/OffSpecularInstrumentEditor.h

auto/Wrap/doxygenCore.i

auto/Wrap/doxygenDevice.i

auto/Wrap/doxygenParam.i

auto/Wrap/libBornAgainCore.py

auto/Wrap/libBornAgainCore_wrap.cpp

auto/Wrap/libBornAgainParam.py

auto/Wrap/libBornAgainParam_wrap.cpp