[deb] Use xyzv2bin to create binary xyzv files on installation

debian/celestia-data.postinst

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -e
+
+case "$1" in
+  configure)
+    for d in extras extras-standard; do
+      if [ -d "/usr/share/celestia/$d" ]; then
+        find "/usr/share/celestia/$d" -name \*.xyzv | xargs -I{} xyzv2bin "{}" "{}bin"
+      fi
+    done
+  ;;
+esac
+
+#DEBHELPER#
+
+exit 0

debian/celestia-data.prerm

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+set -e
+
+case "$1" in
+  remove|deconfigure)
+    for d in extras extras-standard; do
+      if [ -d "/usr/share/celestia/$d" ]; then
+        find "/usr/share/celestia/$d" -name \*.xyzvbin -delete
+      fi
+    done
+  ;;
+esac
+
+#DEBHELPER#
+
+exit 0

debian/control

@@ -12,6 +12,7 @@ Conflicts: celestia (<< 1.4.1), celestia-common (<< 1.7.0~), celestia-common-non
 Replaces: celestia (<< 1.4.1), celestia-common (<< 1.7.0~), celestia-common-nonfree (<< 1.7.0~)
 Recommends: celestia
 Depends: ${misc:Depends}
+Pre-Depends: celestia-tools
 Description: data files for Celestia, a real-time visual space simulation
  Celestia is a free 3D astronomy program. Based on the Hipparcos
  Catalogue, it allows users to display objects ranging in scale from