examples: Add pacman example

* examples/pacman/actor.lua: New file.
* examples/pacman/actor_ghost.lua: New file.
* examples/pacman/actor_pacman.lua: New file.
* examples/pacman/board.lua: New file.
* examples/pacman/display.lua: New file.
* examples/pacman/game.lua: New file.
* examples/pacman/input.lua: New file.
* examples/pacman/levels/1.txt: New file.
* examples/pacman/levels/2.txt: New file.
* examples/pacman/levels/3.txt: New file.
* examples/pacman/main.ncl: New file.
* examples/pacman/media/door.png: New file.
* examples/pacman/media/food.png: New file.
* examples/pacman/media/freezer.png: New file.
* examples/pacman/media/ghost_blue_e.png: New file.
* examples/pacman/media/ghost_blue_n.png: New file.
* examples/pacman/media/ghost_blue_s.png: New file.
* examples/pacman/media/ghost_blue_w.png: New file.
* examples/pacman/media/ghost_frozen_e.png: New file.
* examples/pacman/media/ghost_frozen_n.png: New file.
* examples/pacman/media/ghost_frozen_s.png: New file.
* examples/pacman/media/ghost_frozen_w.png: New file.
* examples/pacman/media/ghost_green_e.png: New file.
* examples/pacman/media/ghost_green_n.png: New file.
* examples/pacman/media/ghost_green_s.png: New file.
* examples/pacman/media/ghost_green_w.png: New file.
* examples/pacman/media/ghost_orange_e.png: New file.
* examples/pacman/media/ghost_orange_n.png: New file.
* examples/pacman/media/ghost_orange_s.png: New file.
* examples/pacman/media/ghost_orange_w.png: New file.
* examples/pacman/media/ghost_purple_e.png: New file.
* examples/pacman/media/ghost_purple_n.png: New file.
* examples/pacman/media/ghost_purple_s.png: New file.
* examples/pacman/media/ghost_purple_w.png: New file.
* examples/pacman/media/ghost_red_e.png: New file.
* examples/pacman/media/ghost_red_n.png: New file.
* examples/pacman/media/ghost_red_s.png: New file.
* examples/pacman/media/ghost_red_w.png: New file.
* examples/pacman/media/pacman.png: New file.
* examples/pacman/media/pacman_dead.png: New file.
* examples/pacman/media/pacman_e.png: New file.
* examples/pacman/media/pacman_n.png: New file.
* examples/pacman/media/pacman_s.png: New file.
* examples/pacman/media/pacman_w.png: New file.
* examples/pacman/media/wall_.png: New file.
* examples/pacman/media/wall_b.png: New file.
* examples/pacman/media/wall_bl.png: New file.
* examples/pacman/media/wall_blr.png: New file.
* examples/pacman/media/wall_br.png: New file.
* examples/pacman/media/wall_l.png: New file.
* examples/pacman/media/wall_lr.png: New file.
* examples/pacman/media/wall_r.png: New file.
* examples/pacman/media/wall_t.png: New file.
* examples/pacman/media/wall_tb.png: New file.
* examples/pacman/media/wall_tbl.png: New file.
* examples/pacman/media/wall_tblr.png: New file.
* examples/pacman/media/wall_tbr.png: New file.
* examples/pacman/media/wall_tl.png: New file.
* examples/pacman/media/wall_tlr.png: New file.
* examples/pacman/media/wall_tr.png: New file.
* examples/pacman/parser.lua: New file.
doc: Release v1.1

* NEWS: Updated accordingly.