Beta: 2.5 beta 6

Hi all,

Yes, it's time again for the next beta!  Get it as usual at
http://www.ttdpatch.net/src/

Another quick bit about translations, most languages are done or close to
being done, but I'm right now looking for a *Finnish* translator.  If
you're good at Finnish and would like to help translating TTDPatch to your
language, please email me as soon as possible.

Once again I've had to let a few smaller new features slip in.  This time,
Steven_h has added truck stops, which work like bus stops except for
non-passenger cargos, while Oskar has added an experimental feature
allowing a company to buy more than 255 trains
(experimentalfeatures.incvehconsist on).  Note that if you do have more
than 255 trains, the train list will not work correctly and will draw
trains all over the screen.

And since everybody seems to be adding features, I've made a small one
too: the amount of cash per company has been bumped to a 64-bit variable.
That means that it is no longer limited to the equivalent of £2 billion,
but rather £9 trillion trillion. That should be enough for a while. Note
that the individual amounts of the various categories, as well as other
sums such as the company value stay limited as before, only the real
amount of cash has had the limit raised like this.

Finally there have been a whole slew of bug and crash fixes again, see
below for the full list.