Re #37. Basic parser and load algorithm, excluding monitors.

Framework/DataHandling/test/LoadNexusGeometryTest.h

Framework/NexusGeometry/CMakeLists.txt

...y/inc/MantidNexusGeometry/InstrumentGeometryAbstraction.h

...xusGeometry/inc/MantidNexusGeometry/NexusGeometryParser.h

...usGeometry/inc/MantidNexusGeometry/ShapeAbstractCreator.h

...ometry/inc/MantidNexusGeometry/ShapeGeometryAbstraction.h

...ework/NexusGeometry/src/InstrumentGeometryAbstraction.cpp

Framework/NexusGeometry/src/NexusGeometryParser.cpp

Framework/NexusGeometry/src/ShapeGeometryAbstraction.cpp

...rk/NexusGeometry/test/InstrumentGeometryAbstractionTest.h