(svn r8639) [0.5] -Update readme's, bugs, installers, changelogs etc. to prepare for 0.5.0-RC5.

(svn r8638) [0.5] -Backport from trunk (8637):
-Fix: CTRL-clicking on a hangar in the order list segfaulted as hangars are part of a station instead of real depots

(svn r8636) [0.5] -Backport from trunk (8634, 8635):
-Fix: draw canal edges under buoys that are in a canal
-Codechange: replace missing sprites with a red question mark

(svn r8630) [0.5] -Backport lots of language updates from trunk

(svn r8627) [0.5] -Backport from trunk (8409, 8420 + 8421, 8533, 8612):
-Regression: When the latest news was deleted, the news queue wrapped back to the oldest item, showing all news again.
-Regression [FS#573]: ShowLastNewsMessage could show an out-of-bounds news item because it did not checked if a previous item actually existed the first time it is called (forced news is INVALID_NEWS).
-Codechange: Rename the 'New <vehtype>' button of the global vehicle lists to 'Available <vehtype>' as it is a view-only list, not one from which you can purchase (rolling) stock.
-Fix: segmentation fault when the toolbar gets removed and you have selected one of the items in a submenu of the toolbar.
-Fix [FS#582]: When the currently selected player in the performance details window is no longer active, choose the first active player instead of the first player as that may also be inactive.

(svn r8626) [0.5] -Backport from trunk (8294, 8296, 8536, 8540, 8609):
-Fix: deleting a vehicle with shared orders, but no orders would fail to reset prev_shared and next_shared
-Fix: GenerateVehicleSortList()/CmdMassStartStopVehicle() tried to put a TileIndex into an uint16
-Fix (FS#577): Road Vehicles now can obtain a slot even if the station is very spread out
-Fix[YAPF]: Assert when buoy is placed on NE or NW map edge (Dan)
-Fix: a road vehicle that is very close after another (slower) road vehicle gets its speed reset to 0 when entering a tunnel, which causes a traffic jam outside of the tunnel.

(svn r8625) [0.5] -Backport from trunk (8253, 8273, 8497, 8520 + 8542):
-Codechange: Be more strict about language generation and fail any languages not having the mandatory ##name, ##ownname and ##isocode pragma's.
-Fix: return value from clamp was ignored
-Codechange: Increase the size of the sound/video/music-drivers to 32 bytes (instead of 16) so their actual parameters can be passed. Sound has for example 'bufsize' and 'hz'.
-Fix/Feature: requery gameservers that did not respond to their first query.

(svn r8624) [0.5] -Backport from trunk (8239, 8240, 8315):
-Regression (r7278): Help window was empty for UNICODE builds
-Fix (r8013): Put the output of -h to stdout and not to stderr (through ShowInfo)
-Fix: use ShowInfo over fprintf(stderr, as Windows doesn't always have a stderr visible/available

(svn r8623) [0.5] -Backport from trunk (8593, 8608, 8619, 8620)
-Fix (FS#564): bridges do not get destroyed when the bridge head gets flooded and there is a vehicle on the bridge.
-Fix: you were unable to build roads in the scenario editor when there is no town 0, even though there are other towns.
-Fix: store the ownership of a water tile in the buoy tile and set the ownership of the water tile when the buoy is removed. This solves the issue of removing ownership from canal tiles thus making is possible for other players to remove the canal tile.
-Fix: buoys on canal tiles do not flood anymore.

(svn r8500) [0.5] -Fix: [OSX] freetype failed to be detected (now it's always enabled because Xcode installs it)
-Fix: [OSX] fontconfig is disabled even if it's found because the default one in OSX is 2.1.0 and OpenTTD needs at least 2.3.0
-Fix: FREETYPE_CONFIG is only set when it's undefined. This makes it possible to add it as argument to make