Added some image mapping features and calculations.

- made images transparent for background reason.
- added player position images.
- created NPC sprite.
- added css file and some code useful for placing icons over the map
- Player icon overlaps the map showing they are standing on it.
*We need to change the layout of the maps a little bit, some tiles show
the player standing on spots they shouldn't be.
- When the player clicks to move, the sprite changes in the direction
the player moved from.
- There are a few other things done that can be looked in the change
log.