With jw-build, it is now unnecessary to maintain any packages' dependency
information outside of its own directory. To integrate a package into the
central build and versioning system, it suffices to keep it in a directory
next to all other project directories. Within a package, a small,
self-explaining, ini-file can be used to define packages required for building
and installing it.
Signed-off-by: Jan Lindemann <jan@janware.com>