ANSWT refactor

[dylanmikesell]

I refactored this code considerably. Many things were moved to functions, including all plot types. Also moved to a grid in kilometers rather than degrees. There is a verbose flag in the code (not accessible from CLI yet) that will turn on logging/debugging output to see the dimensions of various parameters/matrices. There is also a plot flag for either UTM or local. Local shows plots in a local grid relative to mean station location. This is not a CLI input yet either. Have to change source code. I took all of the UTM conversion from https://gist.github.com/twpayne/4409500. I include the "unproject()" function so we can go back to lat/lon for plotting. But this is not currently implemented.