reorder error checks in -cifti-label-export-table, minor things
add text file to reasons to make an operation in src/Commands/README

new -cifti-label-export-table command, added "index from number or name" functions to CiftiXML mapping types

expose parcellation functionality from AlgorithmCiftiParcellate and move to new XML
add convenience functions for getIndexForVoxel taking separate indexes

Resolve WB-382: Implement draw borders as unstretched lines to remove borders that are erroneously drawn near cuts.  In addition, border points that are barycentrically projected to three edge nodes are inhibited from display when unstretched lines is enabled (prevents border points off the surface).

Started to add logic to avoid drawing border points that project to 'edge' nodes.  It is disabled at this time.

Resolve WB-382, Add unstretched lines for border drawing so that extremely long border lines are not drawn connecting cut edges of the surface.

WB-382: Draw Borders as Unstretched Lines: Instead of implementing the unstretched lines functionality, lines are not drawn when one of the endpoints does not project to the flat surface, typically due to a cut or medial wall removal.

Fixed OpenGL Invalid Operation.  Border line drawing mistakenly contained a glBegin/glEnd pair inside another glBegin/glEnd pair.

ENH: install target binaries

make reading functions for GiftiLabelTable consistent, fix bug preventing warning of multiple labels that should be interpreted as unlabeled

Changed operation NiftiInformation so that when the '-print-header' operation is used, it reads only the NiftiHeader and not the entire NiftiFile.  There is no need to read the entire file for this operation and for very large files, this operation either took a very long time or crashed.

Moved helper method for creating cartesian chart data from CiftiMappableDataFile to CaretMappableDataFile so that it can be used by Metric and Volume Files.  Added loading of charts from a multi-map volume file.  Added Charting library for include files in CommandLine and Test caused by addtions to VolumeFile.h

ChartableInterface::getCaretMappableDataFile() was pure virtual but implemented identically in all implementing classes.  Since it does not require any 'member data' it is now implemented in the interface and implementation has been removed from all of the implementing classes.

I thought I had committed these changes to metric file charting prior to pulling from repository but I guess not.

Adding Charting include files to MetricFile.h required adding the Charting Module to both Commands and OperationsBase CMakeLists.txt files to enable compilation.