(svn r1505) -Fix: Refit engine button is now disabled when cargo capacity equals zero

(svn r1504) enummed town ratings (Jango)

(svn r1503) Added feature:
o allows users to setup the production values of the rawmaterial producing
industries in the editor

Modified:
o ttd.h - added CT_INVALID for 0xFF cargo type
o english.txt - added 1 string
o industry_gui.c - the feature itself
o window.h - added compile asserts to the structs which checks whether their
sizes are smaller than WINDOW_CUSTOM_SIZE

Thanks:
o Darkvater to bother me to constantly improve the patch
o Various users at #openttd for testing

(svn r1502) -Fix: [1101889] Crash under windows... stupid typo in player_gui.c ^ should've been &
-Fix: in multiplayer clientlist can only be opened once

(svn r1500) -Feature: Train window shows now the number of vehicles per row (mpetrov)

(svn r1499) -Fix: Order tooltip now explains the ctrl+click scroll. [1101412 / 1097043] (mpetrov)

(svn r1498) -Feature: Addded keyboard shortcuts for the order window

(svn r1497) -Fix: [1101179] Crash if generating land while industry window is open. This also happened for towns and the land information window
-Added DeleteWindowByClass() function that deletes all windows of a given class

(svn r1496) -Fix: highscore no longer crashes in network games with a dedicated server. At the end of the game (can only be set by the server) the highscore is shown for the top5 companies of that game
-Fix: fixed some compiler warnings
-Added PF_NETWORK_ONLY flag to settings. Such a setting can only be modified in a network game.

(svn r1495) -Fix: Loan does not count against the company value
-Feature: New companies receive a 5-year protection period