Fixed error in palette file where 'false' was used where 'NULL' should have been used.
Updated a compile and link flags for c++11 for clang/openmp compiler on mac.
Resolve WB-404 Make 'Apply to All Maps' more responsive: Moved the virtual method 'updateScalarColoringForAllMaps()' out of CiftiParcelSeriesFile and CiftiBrainordinateDataSeriesFile and into CiftiMappableDataFile so that it is used for all CIFTI filetypes.  This method just invalidates the coloring in each map instead of coloring every map.  The coloring for a map gets updated when the map is needed for display.  This provides a notable reduction in time when the melodic_IC.dscalar.nii has its palette color mapping changes with apply to all maps selected.