Tiles can be purchased, although a bug causes selecting the wrong tile.
Clicking once _without moving the mouse between click and release_ logs what tile you clicked and "selects" the tile.
Selecting a tile twice opens a confirmation window to purchase the tile. If the user clicks yes, a function is called that does nothing, onConfirmBuyTile, that needs to be implemented.
Currently the getTileFromPx function in the map is returning not-quite the correct values for this specific usage. I'm working on that.
Tile selection bug fixed. See details for clarification on selection.
To "select" a tile, click and release without moving the mouse.
To start a purchase attempt, attempt to select a tile that you currently already have selected.
Merge branch 'impact' of https://github.com/tufts-LASER/Trails-Forward-server into impact

Conflicts:
	public/lib/game/cachedisomap.js
	public/lib/game/main.js