'make -j' is now a built-in feature

[bombasticbob]

The new configure scripts check for multiple cores, and automatically invoke 'make' with the '-j' flag that assigns one thread per CPU counted during the configuration process.

In short, this will at least speed up the build process by a factor of 2, assuming you have at least 2 cores in your CPU or VM.

If this causes problems, please comment here.