Python: add prof1d.py

[rmcdermo]

In this PR you can plot in depth profiles of quantities useful for char oxidation analysis. Here is a working set of PROF lines.

&PROF ID='Tx' , XYZ=-0.001,0,0, QUANTITY='INSIDE WALL TEMPERATURE', IOR=-1 /
&PROF ID='MOISTUREx', XYZ=-0.001,0,0, QUANTITY='SOLID DENSITY', MATL_ID='MOISTURE', IOR=-1 /
&PROF ID='PINEx', XYZ=-0.001,0,0, QUANTITY='SOLID DENSITY', MATL_ID='PINE', IOR=-1 /
&PROF ID='CHARx', XYZ=-0.001,0,0, QUANTITY='SOLID DENSITY', MATL_ID='CHAR', IOR=-1 /
&PROF ID='ASHx' , XYZ=-0.001,0,0, QUANTITY='SOLID DENSITY', MATL_ID='ASH' , IOR=-1 /
&PROF ID='O2x'  , XYZ=-0.001,0,0, QUANTITY='SOLID OXYGEN MASS FRACTION', MATL_ID='CHAR' , IOR=-1 /