(svn r12644) -Codechange: rework the order gui a little to prepare it for some future changes.

(svn r12643) -Codechange: be more explicit about the orders a vehicle has (non stop and full load are ambiguous and depend on some patch settings).

(svn r12642) -Fix: remove buggy buoys at tile 0 from old TTDP savegames

(svn r12641) -Codechange: do not use the same button for two completely distinct tasks, just make an extra button for it and hide them when not needed.

(svn r12640) -Codechange: let GetLoadType make a difference between full load and full load any based on the patch setting instead of using the patch setting directly.

(svn r12639) -Fix: order window was not marked dirty on changed orders.

(svn r12638) -Codechange: give order_gui.cpp a touch of coding style.

(svn r12637) -Fix [FS#1913]: possible NULL pointer dereference when reading some NewGRF data.

(svn r12636) -Codechange: make CmdModifyOrder a little more flexible and remove 'hack' that used the full load flag to set the service if needed flag.

(svn r12635) -Codechange: a bit of a code-style cleanup

(svn r12634) -Feature: Financial and Player Selection Face windows are now remembering their position when toggling sizes

(svn r12633) -Fix: could not make a (go-to) depot order.

(svn r12632) -Fix (r12547): with invisible catenary, trams were be drawn over a bridge

(svn r12631) -Fix [FS#1911]: sometimes aircraft couldn't find their way to their depot.

(svn r12630) -Fix (r12600): Missing 'break' made it impossible to add waypoints to vehicle orders.

(svn r12629) -Codechange: Split VehicleNeedsService() into Vehicle::NeedsServicing() and Vehicle::NeedsAutomaticServicing().
-Fix (r11052): Disable servicing by service-interval if a vehicle has depot orders.

(svn r12628) -Fix: TTDP compatible non-stop wasn't handled properly.

(svn r12624) -Codechange: Make drawing of catenary an attribute of rail types, instead of deciding by the rail type directly.

(svn r12622) -Fix: infinite loop in case your compiler decides that enums are unsigned by default. Patch by Dominik.

(svn r12620) -Fix: automatic servicing of vehicles made them stop in the depot.

(svn r12619) -Codechange: lots of documentation about window related stuff. Patch by Alberth.

(svn r12618) -Codechange: as load and unload type are now split, some case statements got ugly.

(svn r12617) -Codechange: add type safety to the Order's load and unload types.

(svn r12616) -Codechange: r12591 didn't work as expected for NDS, move one function back to cpp

(svn r12615) -Codechange: rename some enums related to depot orders to make it more clear that they are no loading/unloading flags. Also add more type strictness.

(svn r12609) -Codechange: Remove wrong comments and give more comments on the drawing part of subsidies

(svn r12608) -Fix [FS#1909]: pressing 'Load' did not cancel the full load order.

(svn r12605) -Cleanup: variable scope and coding style in train*

(svn r12601) -Fix (r12587): do not reset the index of orders (causes loading ancient savegames to loop infinitively.

(svn r12600) -Codechange: make GetNonStopType return a more augmented type; not is there a non-stop order but the kind of non-stop order, so one doesn't need to check _patches.new_nonstop type everywhere.