Alpha: 2.0.1 alpha 72

Hi all,

let's try this "final alpha before the beta" things yet one more time, as 
usual at http://www.ttdpatch.net/src/

Yet more bugs getting fixed, and still there are almost 200 left to work 
on... but hopefully we can make some serious progress once we go into 
beta.  In particular, the trams feature got a lot of fixes, and now also 
properly supports bridges.  Note that the tram support grf has changed, 
you need to download the updated version from 
http://www.ttdpatch.net/newgrf.html or there will be clipping problems on 
bridges.

TTDpatch now also has an official bug tracker at the wiki, see 
http://wiki.ttdpatch.net/tiki-view_tracker.php?trackerId=1&sort_mode=lastModif_desc 
(or click on the link in the top left box on any ttdpatch.net page).  Feel 
free to add any existing bugs that have been reported elsewhere to it.

It is still somewhat experimental, so if you notice any problems with it 
please report them.

Have fun :)

Josef.

All changes in 2.0.1 alpha 72:
- by Csaba:
   * added possiblity to disable old house types by setting property 8
     to FFh