* macosx/Tcl.xcodeproj/project.pbxproj: add 'DebugMemCompile' build
configuration that calls configure with --enable-symbols=all; override
configure check for __attribute__((__visibility__("hidden"))) in Debug
configuration to restore availability of ZeroLink.
* macosx/tclMacOSXNotify.c: fix warnings.
* macosx/tclMacOSXFCmd.c: const fixes.
* macosx/Tcl-Common.xcconfig: fix whitespace.
* macosx/Tcl-Debug.xcconfig:
* macosx/Tcl-Release.xcconfig:
* macosx/README:
* macosx/GNUmakefile: fix/add copyright and license refs.
* macosx/tclMacOSXBundle.c:
* macosx/Tcl-Info.plist.in:
* macosx/Wish-Info.plist.in:
* macosx/Tcl.xcode/project.pbxproj:
* macosx/Tcl.xcodeproj/project.pbxproj: