Add a timer for the calculations
Attempted to add flibe coolant switch, but messed up

This has a bunch of changes, but most have been commented out.  The code
runs, but not properly.
Revert "Attempted to add flibe coolant switch, but messed up"

This reverts commit da0cffc4c71d35ed2daa71ccbbee340a78549391.
Begin adding a coolant switch for He or flibe

Very beginning of CSWITCH addition
Added switch for power history selection "PSWITCH"
CSWITCH - Step 1

CSWITCH passes successfully to TEMPERATURE subroutine.
CSWITCH - Step 2

Just before altering TEMPERATURE subroutine.  Have set things up so that
one could use multiple salts by simply adding a material database for
the salt and adding an integer to CSWITCH.
Put in CSWITCH, but running for DS_MPBR1 returns 153 instead of 142.
Trying to debug VERSIONSWITCH
Merge branch 'master' into jeremy