Updated German language file
Implemented empty tile highlighting (red = not placeable, green =
placeable in at least one orientation).
Merge branch 'emptytiles' into dev
Implemented current tile display.

If a tile has been drawn and the mouse is hovering over a valid spot, a
low-opacity image of the tile is displayed there. If the current
configuration of the tile forbids placement, the opacity is lower.
Merge branch 'currenttile' into dev
Removed some superfluous things, moved WindowStub to /test.
Added skipping TileState if there are no empty tiles. Closes #1
Merge branch 'skiptile' into dev
Increase current tile opacity. fixes #2
Change Tile to place zombies, lives and ammo automatically. close #6
Merge branch 'autosetup' into dev
Add highlighting for empty buildings and zombies. close #11, close #12
Merge branch 'zombiehighlight' into dev
Disable zombie placement with no empty buildings, skip ZombieState with
no zombies. close #13. close #14
Merge branch 'zombiedisable' into dev
Focus on current player at start of round. close #4
Merge branch 'focus' into dev
Add CTRL+Q shortcut to Exit menu item. close #24
Paint zombies, lives and ammo on current tile. close #25
Refactor MapPane.paintX/drawX methods to use coordinates. close #26