Version 0.3.0, we now have external gravity

configure.ac

@@ -16,7 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Init the project.
-AC_INIT([SWIFT],[0.2.0])
+AC_INIT([SWIFT],[0.3.0])
 AC_CONFIG_SRCDIR([src/space.c])
 AC_CONFIG_AUX_DIR([.])
 AM_INIT_AUTOMAKE