Added 3D files for Booster and thumbnail (implemented)
Added Booster designs for the three fisrt colors
Added CharacterSelection thumbnails for the already implemented classes. Also made a generic loading of characters images
Implemented CharacterSelection thumbnails
Successfully styled JComboboxes. Just the white border left
Finally have descent ComboBox
Even better
May have found a way to make the character selection look less ugly
Added special todo file for design
Moved all todoes to folder
Merge branch 'test' into optimization
Added a hashMap in order to easily find a cell
Also added hashMap system for Node map in pathfinding
Changed the system to check if a cell is occupied by directly puting an attribute to Cell()
Added a chained list to Cells so they repaint quicker
Implemented the use of the chained list instead of arrayList
Reduced again the call to the arrayList. The goal is to do every possible bit of calculus before the game starts so it isn't slowed down