added module for niblett bostick analysis

Signed-off-by: LK <LK@uni>
worked on NB trafo

Signed-off-by: LK <LK@uni>
NB trafo roughly done - how to distiguish between modes???

Signed-off-by: LK <LK@uni>
niblett bostick works...but no ellipses yet, just rho-depth arrays

Signed-off-by: LK <LK@uni>
Fixed conversion of survey txt files into cfg. The latter is needed to generate EDI-files from j-files -- Note: delimiter "\t" is still hardcoded!!

Signed-off-by: LK <LK@uni>
added script for converting ONLY coordinates in edi files for a whole folder: utils/convert_coordinates_in_edis.py
added assert_decimal function to format.py

Signed-off-by: LK <LK@uni>
added sign correction to degminsec->decimal_deg conversion

Signed-off-by: LK <LK@uni>
aded module for handling input for bayesian1D inversion code (NICTA)

Signed-off-by: LK <LK@uni>
made plotting data function return classes for easier manipulation of plots
Merge branch 'master' into jp.zen
corrected EDI - output was stddev, set to variance now

Signed-off-by: LK <LK@uni>
all plots for occam2d are now classes.  They are called within Occam2DData and Occam2DModel and the class instance is returned so the user can change the plots easily.
added a speed up for plotting occam model and added some flexibility to plotting
Merge branch 'master' into jp.zen
adding a class to manipulate an occam model interactively, lots of work to do