By default the Source Builder now directly installs in the prefix and
does not create tar files. You need to supply options to create build
set level tar files and/or package level tar files.
Remove the need to add the --force option. Also revert the force option
back to the --force from --no-force and leave it so the user can
bypass the host check of various packages.
A build set can invoke another build set. This allows an 'all'
type build set that builds all the RTEMS archs.
Change the get config call to return a map of paths and files.
