Added the Independant Channel Time contour program, which computes the x
y and z values necessary to plot the time contour for each respective
piezo channel and stores that data currently in marked text files within
the same directory.  Additionally the program computes the average time
contour data of the two accelerometer channels and stores them.

I made some slight changes to the avgPSDMultiFiles and avgPSD functions
in Piezofunctions.py to increase efficiency and incorporate the changes
Noel made to the freqProc.py module namely using the getAvgPSd function
from that module.
Testing commit and push to AEProc repo