Added documentation to function pointers in grid.h.

Simplified and structured move_player() function for less repetition.

Added new function to be called at any program exit situation.

Added documentation and commentary to new struct in grid.h.

Formatted files to match project syntax and added documentation.

Added new display method with SDL2 library, event system, refactoring.

Fixed SDLContext global variable scope in sdl2.c and sdl2.h.

Added new library for 2D graphics and more, config changes to go along.

Added goal number tracking to determine winning game.

Added new family of display functions that use ncurses along with tests

Added all new documentation to structs in player.h

Added documentation to struct attributes in grid.h

Source and header files as well as Doxyfile are reorganized.