fix: added icosahedron module files to repo
First steps towards the documented 'penguin' project using sphinx.
Renaming to penguin.
relocation of default.conf to make it more visible.
fixed limits and renamings in example.py
linking default.conf did not work on davinci
working on the documentation...
Merge branch 'penguin'
_map3d is the fine map if fine map is used for propagation
further progressed with documentation.
added copyright statement.
added header in all source files with copyright and licence statement
added nfft installation step to installation instructions in doc
merged