Fix sky scrolling for several scenarios.
SkyScrollMode=1 in Scenario.txt is broken, so I used  SetSkyParallax() in the script.
Remove triangles from windmills in Windmill.ocs.
correct version to 5.4.0
masterserver: be more verbose when reporting an error while registering a new update
mac: Clonk.icns is oc.icns
cmake: Insert hacks and hardcoded paths to make mac version compilable using Unix make
StdSchedulerMac: Only add NSRunLoop additions for main thread
C4NetIO: Endless polls cut short by cheap hack
register new version at masterserver: fix php script
fix game does not initialize when OS runs for longer than 30 days or so.

Special thanks to Yshxod for having the patience and debugging the game with me!
Unified chunk size (3) / reduced chunks' weight.
cmake: mac: make install installs bundle
mac: Add precompiled nib files to really not require Xcode …
StdSchedulerMac: Was crashy because of faulty memory management which is now hopefully better
fix typo in english translation
fix typo in documentation (#1023)
installer should delete Issues.ocf, Experimental.ocf etc on install (part of solution to #1029)

(cherry picked from commit ba2d71c94251b4bbbb146d2018040654b64e54c0)
fix update via *.ocu on Windows 7 (#870)

see bugtracker entry for details

(cherry picked from commit 325d2b80e1a8ccb3c55a98000de75cd167f1ce19)
Moved Dialogue to Helpers.ocd to avoid copies
Fix issues with Crash.ocs intro (#951)