Eat the Whistle GPL Code

Fix for OS X deprecations.

Fixed MSVC error C2143.

Upgrade & fix for GTK team editor.

Fix iOS project.

Fix for 64bit and iOS deprecations.

The old tiny resolutions has been removed from the selection menu (they can be restored defining OLD_RES costant).

The new resolutions are: 640x480, 800x600, 1024x768 and 1280x1024, there is also the initial 480x320 defined in the etw.cfg config file. As soon this file could be updated, this resolution could be removed.

NOTE: does is scaling still used? Because any selection it doesn't seems to affect the game so if it's an old featured needed on Amiga it could be removed from the menu.

Fixed Hurricane Studios URI.

Removed obsolete file SDLMain.h. Added os_open definition as fopen also on Mac OS X, maybe it could be useful to use os_open function instead.

Fixed startup problem outside Xcode on Mac OS X; the problem was due that when the an application is launched from the Finder, the current working directory is set to /.

64bit fixes