Resolve "Add recipe yaml check + visualize recipes"

Closes #51

See merge request scs/cocosy/overcooked-simulator!19

# Conflicts:
#	overcooked_simulator/gui_2d_vis/overcooked_gui.py

Resolve "Sprites for all game items and counters"

Closes #37

See merge request scs/cocosy/overcooked-simulator!22

# Conflicts:
#	overcooked_simulator/gui_2d_vis/overcooked_gui.py
#	overcooked_simulator/gui_2d_vis/visualization.yaml

Resolve "Game time limit"

Closes #59

See merge request scs/cocosy/overcooked-simulator!28

Added game time limit, property game_ended of overcooked_environment returns true when time limit is reached. GUI switches to game end screen when it is finished.

# Conflicts:
#	overcooked_simulator/game_content/environment_config.yaml
#	overcooked_simulator/game_content/player_config.yaml
#	overcooked_simulator/gui_2d_vis/images/bun.png
#	overcooked_simulator/gui_2d_vis/images/cooked_patty.png
#	overcooked_simulator/gui_2d_vis/images/cutting_board_large.png
#	overcooked_simulator/gui_2d_vis/images/lettuce.png
#	overcooked_simulator/gui_2d_vis/images/lettuce_cut.png
#	overcooked_simulator/gui_2d_vis/images/lettuce_cut_smaller.png
#	overcooked_simulator/gui_2d_vis/images/lettuce_smaller.png
#	overcooked_simulator/gui_2d_vis/images/meat.png
#	overcooked_simulator/gui_2d_vis/images/onion_cut.png
#	overcooked_simulator/gui_2d_vis/images/onion_large.png
#	overcooked_simulator/gui_2d_vis/images/onion_soup_plate.png
#	overcooked_simulator/gui_2d_vis/images/onion_soup_pot.png
#	overcooked_simulator/gui_2d_vis/images/pan.png
#	overcooked_simulator/gui_2d_vis/images/pot_smaller.png
#	overcooked_simulator/gui_2d_vis/images/raw_fish.png
#	overcooked_simulator/gui_2d_vis/images/raw_patty.png
#	overcooked_simulator/gui_2d_vis/images/sink.png
#	overcooked_simulator/gui_2d_vis/images/sink_large.png
#	overcooked_simulator/gui_2d_vis/images/tomato.png
#	overcooked_simulator/gui_2d_vis/images/tomato_cut.png
#	overcooked_simulator/gui_2d_vis/images/tomato_soup.png
#	overcooked_simulator/gui_2d_vis/visualization.yaml
#	overcooked_simulator/pygame_gui/pygame_gui.py

Resolve "Environment has internal time not datetime now"

Closes #55

See merge request scs/cocosy/overcooked-simulator!24

# Conflicts:
#	setup.py

# Conflicts:
#	overcooked_simulator/overcooked_environment.py