Simplify configuration

[Cypher1]

Current State

Ibis currently provides a set of API functions to generate graphviz and json with either all solutions or solutions within a certain number of edges of the 'best' solution (the solution with the most edges). Some of these options only make sense for planning, which is now enabled via the recipe format's flags field.

Future work

Clarify a solution for all these options, ensuring that additional recipes cannot modify the configuration without permission.
Likely steps for a solution are:

• Move all config & function options into the Ibis json format (ensuring only valid configurations are accepted, issuing warnings on invalid configurations)
• Update tests to use the configuration options rather than functions
• Remove excess API functions & document the configuration options