Changeset 402:235be9d4b6ab in lemon-main for demo

Many doc improvements for Circulation (#175)

• More precise doc for members.
• Several doc fixes.
• Add doc for public types.
• Better formulations.
• Add useful notes to the problem description.
• Use supply instead of excess in the doc.
• Hide the doc of the traits class parameter.
• Use \tparam for template parameters.