GitLab

* 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;

matrixprocessor now listens for dataAdded signals of the data container. also, documentation of the MatrixProcessor class.

contains processing of IMAGE and TRANSFORM messages

 * supports all file formats that can be read via ITK
 * does not support image series

* SliceExtractor FitToWindow property defaults to true to mimic old behavior per default
* PointPredicateRenderArea renders y axis label

* Now supports optional scaling and offset of image
* Added properties for geometry render style and size
* Fixed some scribbling-related bugs

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