(svn r16909) -Fix [FS#2996]: NewGRF stations would be triggering assertions all over the place when using the more advanced station types.
-Change: make (rail) waypoints sub classes of 'base stations', make buoys waypoints and unify code between them where possible.

(svn r14876) -Fix [FS#2509] (r14849): Reserved path loop detection was broken for stations.
Don't set the test tile to the tile the very first iteration handles. Update the test tile instead in the loop.

(svn r14258) -Codechange: rework the way to query the vehicle hash to make sure it always results in the same irregardless of the order of the hash-linked-list.
-Fix: desync in PBS reservation following, vehicle flooding and road vehicle overtake/follow code.