Spring RTS Engine

Something's weird about the build grid since v0.50b2. I can't get buildings to sit together properly on flat terrain anymore, everything jumps by 1 + 1/2 square when I move the mouse in build mode so stuff like solars and winds can't be directly adjacent and flush, nor can dissimilar factories meet at the edges.

The buildings are now aligned at two of those squares you see. This was necesary to get the pathfinding to work well with them. So now they have the same alignment as in TA.

You can still build rows of adjacent buildings with the shift-drag thing, however.