(svn r4207) - Fix: Update OS/2 on 0.4 branch, too

(svn r4117) - Prepare 0.4 branch for release. Update readme's, bugs, installers and makefile, changelog, etc. to 0.4.7

(svn r4104) -Backported 4102: updated OSX docs about triple binary

(svn r4102) -Backported 3673, 3674, 3675, 3679, 3682, 3882, 3884 [all OSX]
added support for G5 (ppc970) optimised code
added support for triple binaries (ppc, ppc970, i386)
updated the makefile to handle building of universal and triple in a more automated way (way less flags to set)
now it's no longer needed to spent minutes setting up flags when releasing. It works out of the box :)
note: even though it looks like it's a lot of commits, it really is that there changes were introduced in small pieces in the trunk

(svn r4100) -Backported 4082 and 4099
the cocoa driver no longer crashes when going to fullscreen (this one depended on the resolution)
teh cocoa driver speedup of around 1000% applies to Intel macs, so the driver is now just as fast as the PPC one

(svn r4097) -Backported 4084 properly (included the last line)
also added a header that is needed because we didn't backport the new feature, that includes the header in the trunk

(svn r4095) -Backport 4060, 4084
made the release target for OSX do more work (less manual work when releasing)
updated some OSX documentation

(svn r4094) - Allow unused wagons have their ->first set. This fixes the faulty
cache warning message, and noticably speeds up depot operations in large
games. Backport of r3576 from trunk

(svn r4072) - Backport from trunk (4071):
- Fix: [NPF] Trains & busses were unable to find a route when leaving a depot or bus stop. Small omission from r4023 (fix by glx)

(svn r4044) Rename 0.4.5 branch to 0.4. Further minor releases will be in the 0.4 range, to prevent enormously long version numbers.