To do list

To-do list

Coll:

• Reorder/add test cases for accessors that use Key.

Key:

• Key can't cope with blocks that have the same name but different attributes (e.g. Q value) or block specifiers.

general:

• Document that the elements of Coll and Block don't have associated key values, but that the keys are properties of the elements. That means that keys are not immutable.
• Document in the class descriptions what kind of containers Line, Block, and Coll are.