TOPIC: Use Of Parallel Libraries: ScaLAPACK & BLACS
GOAL:  Linear System Solution For Full Matrix Using ScaLAPACK
CODE:  scaex/.

After finishing the tasks of the previous session, we start looking at
how to use a parallel library like ScaLAPACK along with our own code. 

Today we will get to the point where we understand how to initialize
BLACS and ScaLAPACK and how to set up the data for calling ScaLAPACK,
e.g. with the purpose of solving a linear system.