(svn r22893) -Fix [FS#4744]: [OSX] Compilation on OSX 10.7 was broken (based on patch by leecbaker)
-Add: [OSX] Support for fullscreen mode when compiled against SDK 10.7. Otherwise fullscreen mode is disabled when OpenTTD is run on OSX Lion

(svn r19003) -Fix [FS#3194]: [OSX] OS X 10.5+ does not (always?) handle 8bpp graphics in a suitable manner. This is actually not a fix but a nasty work around; you can still easily trigger the bug/issue by overriding the 'default' blitter choice (Brad Oliver). I can/have not test(ed) (including compiling) this fix.
Bjarni once suggested that 8bpp works for him on 10.5, so apparantly not all 10.5+ does not handle 8bpp graphics. Nevertheless, it seemed that for some systems the already existing 'does this support 8bpp' did not work, i.e. the OS API seemed to suggest that 8bpp worked when it actually did not. So, I don't know what is going on precisely here but it's definitely not nice to suggest that it supports 8bpp when it doesn't. So just ditch 8bpp support for anything that we suspect might not support 8bpp...

(svn r14032) -Fix (r13584): [OSX] changed the condition for selecting 8 or 32 bpp blitter by default
Now we will pick 32 bpp if no 8 bpp fullscreen resolutions are available on the main display (the one with the dock)