Added new art for states of the ghost

Small update; ghosts now look scared when running (eyebrows), and
display readiness to revive (halo).

DungeonMain.java:
*Loaded new images and checked if they were to be displayed in
paintComponent. Seems to freeze occasionally though.

Ghost.java:
*Made runTimer public to use it for display.

*Stopped decrementing runtimer when it equalled 0.

Skills.java:
*Moved description stuff to constructor.

Added ghost images.