vtk defines added to chart in release mode
Syntax fix for linux build.
Still a problem when call new QVTKWidget(this).  There is a segfault when the object i used
Fix charts and add vtk defintions for compiling

Use SetVisible to toggle the plot on and off
Add definiton built from a cmake script
Linux Makefile changes: Still not working

Problems with vtk #define functions.  See config.qmake to see the misbehaving defines.  Wihtout the defines, the vtk static New() is not working. There is a workaround by having the vtk-wrapping built and using the VTK_AUTOLOAD_PATH environment variable.  But then the QVTKWidget does not not work and segfault.

Everything is fine on MS visual studio.
vtk defines added to chart in release mode
Grid_filter delegates and editors
Widgets to define grid_filters
Fixed signal/slots for grid_filter widgets
Merge remote-tracking branch 'origin/grid_filter'
Change in qtplugins MMakefile: renaming of grid_filter_widgets.h/cpp
Change in grid MMAkefile for new file (utilities)