Update and Add Documentation for FileSet, Collocator and SPAREICE

[JohnMrziglod]

Most tutorials need an update or to be finished. The documentation strings of many classes (especially SPAREICE) must be reviewed and adapted to the new API.

FileSet

• Finish tutorial

Collocations

• Update + Finish tutorial
• Update documentation strings and examples

SPAREICE

• Add tutorial
• Update documentation strings and examples