Extend ProcessCurve to allow reading coordinates from file
This MR extends the ProcessCurve module of NekMesh to read the coordinates from a file (in 2D).
The file should be in the .pts format, with DIM=1
and one field corresponding to the y-coordinate. For example:
<?xml version="1.0" encoding="utf-8" ?>
<NEKTAR>
<POINTS DIM="1" FIELDS="y" >
0.000000E+00 0.000000E+00
1.000000E+00 1.000000E+00
</POINTS>
</NEKTAR>