Previously we were only able to build with --with-features=small.
Thanks to all the compatibility work done in the kernel and LibC over
the last couple of months, we can now build --with-features=normal.
It's not the biggest deal in the world, but it's pretty nice to see
this kind of progress!
Ports/.port_include.sh, Toolchain/BuildIt.sh, Toolchain/UseIt.sh
have been left largely untouched due to use of Bash-exclusive
functions and variables such as $BASH_SOURCE, pushd and popd.
Much redundancy is removed from package scripts with this system.
It also supports simple dependency management, uninstalling (through
BSD ports style plist files), cleaning up after itself (with clean,
clean_dist, clean_all commands), etc.
