Make windows closeable based on subwindow flags. [1664]
Change some makefile and Info.plist things to clean up version strings. [1701]
Create a safe install target for development versions. [506]
Fix ifdef.
Add a command menu to get around issues with non-US keyboards. [880, 1460]
Merge mac-window-closing and mac-command-menu.
Merge release cleanup changes.
Merge pull request #253 from bensemmler/mac-fixes

Import bensemmler's Mac fixes - thanks!