SVN handles and Git names are merged into one person.
Create GTK *_banner.c files in obj/ subfolders instead of rsrc/ so that they don't need separate cleanup rules.
Make Objective-C code build as Objective-C++ when we build C code as C++.
Add extra optimization defaults for OS X builds since all Intel Macs are guaranteed certain features due to the time of their debut.
Clean up handling of architectures.
Convert object lists to an escaped multi-line format for better diffing.
Add some missing dependencies on the folders in which objects are created.
Add L_CXXONLYFLAGS, and use it to pass "-static-libstdc++" on Windows.
Remove STATICSTDCPP variable.
Rename "CPPONLYFLAGS" variable to "CXXONLYFLAGS", since "CPPFLAGS" traditionaly refers to the C preprocessor, not C++.
Automatically disable ASM when "arm" is found in `uname -m` on Linux.
Link to libz on OS X like on Windows.
Update/fix treatment of libpng libraries and headers under Windows and OS X.
