(svn r9849) [0.5] -Backport from trunk (r9693, r9694, r9697, r9718, r9719, r9725 and 9726):
- Fix: Crash when destroying bridge with train partially on it [FS#738] (r9726)
- Fix: Planes made a 270 degree turn instead of a 90 degree turn on the southern runway of the intercontinental airport [FS#743] (r9725)
- Fix: In-game private messages did not work for clients with high ClientIDs (r9719)
- Fix: Do not allow building of rail vehicles whose railtype is not available (r9718)
- Fix: [YAPF] The guessed path was ignored for ships [FS#736] (r9694)

(svn r9698) [0.5] -Prepare 0.5 branch for release of 0.5.1.

(svn r9695) [0.5] -Backport from trunk (r9668, r9680, r9681, r9687): language updates.

(svn r9660) [0.5] -Prepare 0.5 branch for release of 0.5.1-RC3.

(svn r9659) [0.5] -Fix r9656: missed 2 hunks in last commit

(svn r9657) [0.5] -Backport from trunk (r9585, r9613, r9615, r9633, r9640, r9649):
- Language updates (r9585, r9613, r9615, r9633, r9640, r9649)

(svn r9656) [0.5] -Backport from trunk (r9602, r9641, r9647):
- Fix: Building rail on steep slopes ignored build_on_slopes patch setting (r9602)
- Fix: namegen.cpp was not UTF-8, which caused artefacts in Finnish town names (r9641)
- Fix: Select "Custom" in the difficulty settings gui when changing a setting [FS#733] (r9647)

(svn r9589) [0.5] -Fix (r9587, r9588): this time I really do hope turkish.txt went okay...

(svn r9588) [0.5] -Fix r9587: something went wrong in turkish.txt update

(svn r9587) [0.5] -Backport from trunk (r9585):
- Language updates (r9585)