Added 'double' application parameter type.

...rappers/ApplicationEngine/include/otbWrapperApplication.h

.../ApplicationEngine/include/otbWrapperNumericalParameter.h

.../Wrappers/ApplicationEngine/include/otbWrapperParameter.h

Modules/Wrappers/ApplicationEngine/include/otbWrapperTypes.h

.../Wrappers/ApplicationEngine/src/otbWrapperApplication.cxx

...es/Wrappers/ApplicationEngine/src/otbWrapperParameter.cxx

...appers/ApplicationEngine/src/otbWrapperParameterGroup.cxx

Modules/Wrappers/ApplicationEngine/test/CMakeLists.txt

...ApplicationEngine/test/otbApplicationEngineTestDriver.cxx

...plicationEngine/test/otbWrapperNumericalParameterTest.cxx