Generate a k-point path for band structure plots. Usage:
bandstructKpoints <inFile> <dk> <outfilePrefix>
<inFile> should contain a list of kpoints in the JDFTx syntax,
except with the weight replaced by a label eg. Gamma, X, L etc.
<dk> is the typical dimensionless separation (BZ~1) between k-points.
The script will generate <outfilePrefix>.kpoints containing a list
of kpoints in JDFTx input format and a gnuplot script <outfilePrefix>.plot
to plot the resulting bandstructure. Note that the plot script assumes
that the JDFTx run will produce <outfilePrefix>.eigenvals, so you may need
to set the dump-name in the JDFTx run, move the file or edit the plot script.