Maescool/Catacomb-Snatch — pull request #586 by fierydrake (2012-02-28 23:37:17+00:00)
Title: Tooltips and marker fix in multiplayer and cannot upgrade enemy buildings

Interaction with enemy buildings not allowed
Previously there were a number of issues with highlighting
and markers. This patch changes the functionality to the
following:

* You may only pick up or upgrade buildings you own OR
buildings owned by the Neutral team. This no longer gives
a message, it just doesn't work any more (see next point).

* An interaction marker (the pulsing square reticle) only
appears over a building you can interact with (see above).
And it only appears on your game client.

* Tool tips only appear on ShopItems you own and only on your
own game client.

The code in Player#pickup() that shows the message
"You can not pick that up!" when you try and pick up an enemy
building should no longer be executed, but I have not removed
it.

Hopefully the fact that the marker is no longer shown should
make it obvious enough that you cannot interact with the
Building.

That is all.