Add algorithm steps and explanations

[rocher]

Introduction

As a user providing a solution to a Problem, I want to provide an explanation about the implemented algorithm.

DoD — The Problem can pause itself and add additional information, text or graphics; when the User press Continue this information is possibly removed and the Problem continues, either to the next step or to the end. Additional graphical information must be differentiated from the mathematical visualization of the Problem.

Tasks

• Improve the current pause/step feature
• Add explanation message or graphical details when program pauses itself (use the info layer?)