What is the purpose here
It would be nice to have a section in the documentation that presents a series of simples and easy tasks to be made in ASL data processing using asltk.
For instance:

1. Load and save images
2. Load an image and change its parameters
3. Load an image and make a copy
4. Load a MultiTE-ASL data and create the T1-blgm mapping
5. Load a ASLData and a Reconstruction method (CBF, etc) and change the MRI Parameters before creating ASL mapping

and so on...

This will be important to help new users to get fast answers for simple tasks.