added using statement for clarity
added method for contour mapping with mc or ordered points
simplified to improve clarity
added method that calculates an x_center and range pair based on the thermal penetration interval give (min, max).
improved clarity
added "cmath" to ensure that the proper headers are used in the math calculations. Remember there were issues with math.c being used.
modified kx_limiter2 to deal with cases where k = kmin or max.  It takes care of this by taking the input and offsetting the output
clarification to help with reading
removed qualifier to outside function scope