Roll to MonoGame

Added MonoGame project to solution;
Develop logic

Added converters;
Added basic texture;
Change user interface

Added basic visualizations;
Added visualization logic;
Added input processing;
Minor tweaks

Changed constants to adapt to new visuals;
Fix Move ability

Creatures was able to change direction after destruction;
Physics optimization

Made filtering more strict
Restructure

Implemented commands for Creature class;
Optimization

Minor optimization attempts;
Restructure

Created class-based state machine for Creature;
Restructure
Restructure

Adopted class-based state machine in Creature class;
Restructure

Removed null-class;
Fix States
Fix Chasing AI
Fix Avoiding AI
Fix GUI project name
Fix GUI namespaces
Restructure

Moved Creature commands into corresponding folder and namespace;
Restructure

Moved Creature states into corresponding folder and namespace;
Restructure

Removed deprecated code;