map directive

[admwx7]

This should be a directive that displays a subset of the world, based around the current "location".

• hovering over a tile should display basic information about the tile
  • there should be a delay on this hover, basic information should be things like level and tile type (name)
• clicking on a tile should should emit an event (Map::TileClick) with the full information of the tile that was clicked on.
• should listen for a Map::ChangeCenter event and change the center to the {x, y} provided, if either x or y is missing, then ignore the event.

[admwx7]

Map::ChangeCenter should also pass the index of the tile in the world.tiles array to make editing a little easier.