scripts: changed scripts to work with the new syntax of the package
PhaseMag and MagData: added load and save options for NetCDF files
MagData: changed 3D-plotting to use mayavi (faster and better looking)
test: added more TestCases for various modules
phasemapper: added computation method to use mx and my (now standard)
compare_method_errors: first draft of script to compare the different errors

Scripts are nearly adapted to the new structure and easier to read.
(Except analytic module and scripts get_jacobi and inverse)

For Pushing Purposes

Changed setup.py
Implemented assertion to check if jacobi matrix is the same

Removed old scripts (AnalyticSolution and DataLoader)
Added several template testcases

because Spyder can't create projects in subfolders -.-

jacobi matrix now contains the derivatives instead of descriptive strings

Added a fitting icon