Added a fetch-only file-based caching strategy. Used for pool workers, as these generate enormous caches. Now they can benefit from partial cached results.
Some bugfixes
Icons replaced with black&white versions.
Settings file updated to reflect changes in plotting strategy
Added more default layout values to the settings file for markers
Major re-organization to allow use of setuptools.
Currently not yet fully zipfile-safe, but a lot of changes have been made to bring the project closer.
Added generation of default phases from components. Reduces package size.