Add data lists for media!

The display names are now much more readable, and will be translatable if wanted!

Backgrounds/BACKGROUNDS

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+atom-playground.jpg	Atom Playground
+bedroom1.gif	Bedroom 1
+bedroom2.gif	Bedroom 2
+berkeley-mural.jpg	Berkeley Mural
+brick-wall-and-stairs.jpg	Brick Wall and Stairs
+brick-wall1.jpg	Brick Wall 1
+brick-wall2.jpg	Brick Wall 2
+desert.gif	Desert
+night-city-with-street.gif	Night City with Street
+party-room.jpg	Party Room
+pathway.jpg	Pathway
+xy-grid.gif	XY Grid

Costumes/COSTUMES

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+alonzo.png	Alonzo
+bat1-a.png	Bat 1a
+bat1-b.png	Bat 1b
+bat2-a.png	Bat 2a
+bat2-b.png	Bat 2b
+boy1-standing.gif	Boy 1 Standing
+boy1-walking.gif	Boy 1 Walking
+boy2.gif	Boy 2
+boy3.gif	Boy 3
+cat2.gif	Cat 2
+cat3.png	Cat 3
+cat4.png	Cat 4
+cat5.gif	Cat 5
+dog1-a.png	Dog 1a
+dog1-b.png	Dog 1b
+dog2-a.png	Dog 2a
+dog2-b.png	Dog 2b
+dog2-c.png	Dog 2c
+dragon1-a.png	Dragon 1a
+dragon1-b.png	Dragon 1b
+dragon2.gif	Dragon 2
+girl1-standing.gif	Girl 1 Standing
+girl1-walking.gif	Girl 1 Walking
+girl2-shouting.gif	Girl 2 Shouting
+girl2-standing.gif	Girl 2 Standing
+girl3-basketball.gif	Girl 3 Basketball
+girl3-running.gif	Girl 3 Running
+girl3-standing.gif	Girl 3 Standing
+marissa-crouching.gif	Marissa Crouching
+marissa-sitting.gif	Marissa Sitting
+marissa.gif	Marissa
+unicorn1.png	Unicorn

Examples/EXAMPLES

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+animal-game.xml	Animal Game
+Codification.xml	Codification
+copter.xml	Copter
+count-change.xml	Count Change
+icecream-visual.xml	Icecream Visual
+JSfunctions.xml	JSfunctions
+live-tree.xml	Live Tree
+swimmer.xml	Swimmer
+tree.xml	Tree
+vee.xml	Vee

Sounds/SOUNDS

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+Cat.mp3	Cat
+Chord.wav	Chord
+Dog1.wav	Dog 1
+Dog2.wav	Dog 2
+FingerSnap.wav	Finger Snap
+Kitten.wav	Kitten
+Laugh-female.wav	Laugh Female
+Laugh-male1.wav	Laugh Male 1
+Laugh-male2.wav	Laugh Male 2
+Laugh-male3.mp3	Laugh Male 3
+Meow.wav	Meow
+Pop.wav	Pop