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* parser now allows whitespace in formula
* exports _camera matrix (if present) to m_cameraProperty in parserMode

moved matrixprocessor to base module; removed obsolete positiondata.h and transformdata.h from openigtlink module; fixed include statements;

moved matrixprocessor to base module; removed obsolete positiondata.h and transformdata.h from openigtlink module; fixed include statements;

Starting with commit d6fec679, pipelines need to provide their own light
source to function properly. Lua pipelines didn't, which caused them to
fail to render.

Add a SWIG wrapper for LightSourceProvider to make it accessible from
Lua. Instantiate and attach a light source in existing Lua pipelines.

References #1

* Introducing base module with LightSourceProvider processor
* Updated GeometryRenderer and GeometryRendererDemo to use LightSourceData instead of ProcessorDecoratorShading
* Introducing LightSourceData::bind()

refs #547