Gstlearn

==============
- Update requirements installation procedures in READMEs
- Refactoring of *Mesh* classes
- API cosmetics for PCA / KDD

==============
- Fix segy import for Windows
- FKA demo
- Fix Matern

==============
- Update publishing workflows

==============
- New potential 1D and 2D jupyter notebook tutorials

==============
- New import / export procedures for vectors in Python and R:
- handle NA values (no more need of TEST and ITEST in your scripts)
- accept 1 element (in Python and R) when a function wait for a vector (issue 7)
- build numpy.array or R vectors (issue 5)
- New class: ProjConvolution
- Fix collocated co-kriging
- No more unnecessary dependencies (issue 53)

==============
- Fix windows compilation
- Source cleanup (License and Interface folders removed)
- CMake procedure improvement