modified path back to qt default

removed full path GeneratedFiles for uic file in charts.
Fix: wrong error message in cosgim

Occured when initializing distribution
grid filter and non-sequential categorical coding

unfinished grid filter widget.  unable to create a complex delegate.
Major change to categorical definition for non-sequential coding.  Need
more testing
non-sequential categorical property

Change to consider categorical property that does not start from zero ot
n-1
Change to ColorbarWidget

fix the colorbar for categorical attribute using the annotations in the
lookup table
general improvement

Send signal when a categorical is selected
Add facility to see if segment in log-data are continuous
Add not-equal operator to GsTLPoints
Syntax fix for linux build.
Still a problem when call new QVTKWidget(this).  There is a segfault when the object i used
Merge remote-tracking branch 'origin/grid_filter'
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.