Pygmi

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* New 3D modelling interface
* QC for seismology events
* Added tilt depth to 3D model functionality
* Gridding now has an option for a null value.
* Added Geosoft line data import and display.
* Added older crisp and fuzzy cluster routines
* Numerous bug fixes and improvements.

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* Fixed bug in IGRF for Linux systems
* Fixed dependency on winsound for Linux systems
* Fixed bug on metadata for Linux systems

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* Added updated IGRF coefficients
* Bug fixes in saving of 3d model, when it is used by another process, and in reading csv vector data.
* IGRF bugfix: fixed a bug relating to newer numpy
* Maintenance: Cleaned code in the equation editor.
* Add more control to Anaglyphs
* Fixed the orientation of anaglyph contours
* Fixed a bug in beachball code.
* Introduced anaglyphs for raster data.
* Updated colour bar list to new standards
* Minor changes and a bugfix between ginterp.py and the latest Matplotlib.
* Added directional lighting to 3D display

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* Added axis and orthographic projection option to 3D display view.
* Added perspective change to beachball plots
* Corrected clustering label.
* Bugfix on lithmodel.
* Correction to profile coordinates to place profile in centre of cell, as opposed to beginning of it.
* Added IGRF report backs.
* Fixed bugs with tensor calculations
* fix for error exporting text columns
* fixed a bug with calculating changes only on model
* made changed to the way Matplotlib calls are made.
* speed improvements to gravity and magnetic calculations
* Fuzzy and Crisp clustering replaced by scikit_learn cluster analysis.
* Import of csv point data enhanced and new cut tool added for point data.
* Dependancies updated. Minor bugs fixed

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* Removed the auto update check due to problems it was giving on many pc's
* Fixed bugs with smoothing data and merging data
* Got rid of excessive old code.
* Fixed a bug with null values from equation editor.
* Fixed null value bug exporting RGB TIFFs. (8-bit)
* Changed the profile views so that calculated data is drawn over observed data.
* Fixed bugs relating to selection of raster bands going to modelling, and saving of those raster bands.
* Fixed bug on data import for Qt5
* Added Lithology Merge
* Migrated to Qt5

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* Fixed incorrect calculation of remanence.
* 3d import fix.
* Fix for 3d import from text files.
* Anaglyph tests.
* Minor maintenence.
* Seismology Focmec format update.
* Added feature to calculate only changes to model.
* Fixed leapfrog import bug when header is in csv file.
* Readme update.