Beta: 2.5 beta 4

Hi all,

the latest beta version is now available, as usual at
http://www.ttdpatch.net/src/

As you might expect for a beta version, this one again has a lot of
bugfixes, and not much else.  GRF developers should take note of some
changes to the way language IDs are specified (for action 4/B/11). Instead
of using bit 6 to select the old/new language numbering scheme, this is
now done by the GRF version set in action 8.  Please see the updated wiki
page for more details.

Please note that my main email address has changed.  The
 <at> geology.cornell.edu will no longer be active in a few weeks.  However all
 <at> ttdpatch.net addresses will continue to work as before.

Enjoy!
Josef

All changes in 2.5 beta 4:
- prevent "ignore signals" button from working in depot unless entire
  train is in depot
- fixed ghost depots appearing after removing track from railroad crossing
  over town roads
- fixed crash when too many station sets were activated
- fixed morestatistics showing Manage button even with subsidiaries off
- by eis_os:
  * changed onewayroads to only show markers when road building is
    active