Log Message:
Changes 2.0.4:
 - Fix some buffer underruns on the terrain array (this bug could have
   been the cause of arbitrary crashes on some platforms).
 - Don't automatically pop up the city dialog when in observer mode.
 - Treat an alt-left click the same as a middle click, to allow two-button
   mice to work on windows (GTK-2 client).
 - Fix a bug - when a city was transferred/conquered twice the client
   sometimes wouldn't get an update about the second exchange.
 - Fix the behavior of Granary and Pyramids in the Civ2 compatibility ruleset.
 - Fix Pyramids so they are no longer cumulative with Granary.
 - Fix a minor bug that prevented 2.0 savegames from working properly with
   1.14 Freeciv.

Changes 2.0.3:
 - Fix some bugs that show up on 64-bit machines.
 - Fix some bugs with future techs in some situations.
 - Fix some bugs that allowed naval units onto land.
 - Fix a bug that could crash the server when a player picked their nation.
 - Fix a bug with player info not being updated after an alliance is broken.
 - Fix a bug with happiness of a unit's home city when borders change.
 - Fix a bug with happiness of a unit's home city when the unit moves.
 - Fix some bugs with nation starting positions in scenarios.
 - Fix a bug when running the server without stdin input.
 - Don't allow teams to be changed when loading a game.
 - Don't allow observers to vote.
 - Fix a bug with the fallback when generator 3, startpos 3 fails.
 - Fix a crash in the help dialog (when looking at Engineers).
 - Don't popup the caravan dialogs when in observer mode.
 - Fix a crash in goto mode when the mouse is near the map overview window.
 - Fix a bug when a diplomat is killed while the diplomat dialog window is
   in the process of opening.
 - Fix a bug with the diplomat dialog window for spies when you don't have
   an embassy.