Add a package that installed the pre-built maven distribution.
I've given up, for now, on building maven from source. That processed
stumbled on two points before I gave up:
1. It downloaded several hundred .{pop,jar} files and I despaired of
figuring out some way of mirroring and checksumming them; and
2. It exploded complaining about too many unacceptable license files,
which seems odd in its own source tree.
Perhaps someone with more Java fu that I admit to can figure it out.
In the meantime, this is useful.
