Updated configure/make setup so that it can build from recent Linux Distros.
For users without autoconf, automake, you can download the 'gimp-plugin-astronomy.tar.bz2' included here, and then run:
./configure
make
sudo make install
For developers interested in helping improve code, you can download the main HEAD, then run:
aclocal --force
autoconf -f
automake --add-missing
./configure
make
sudo make install