debian: build a python3 package

* debian/python3-spot.install: New file.
* Makefile.am: Ship it.
* debian/control, debian/rules, debian/spot.install: Adjust.

debian/control

@@ -2,27 +2,39 @@ Source: spot
 Section: science
 Priority: optional
 Maintainer: Alexandre Duret-Lutz <adl@lrde.epita.fr>
-Build-Depends: debhelper (>= 9)
+Build-Depends: debhelper (>= 9), python3-all-dev
 Standards-Version: 3.9.5
 Homepage: http://spot.lip6.fr/
 
 Package: spot
 Architecture: any
+Section: science
 Recommends: graphviz
 Suggests: libspot-dev, spot-doc
 Depends: ${shlibs:Depends}, ${misc:Depends}
-Description: the Spot model checking library
+Description: Spot, a model checking library
  Library and tools to manipulate omega-automata as well as
  linear-temporal logic (LTL & PSL).
 
 Package: libspot-dev
 Architecture: all
+Section: libdevel
 Suggests: spot-doc
 Depends: spot
 Description: headers for the Spot model checking library
  C++ headers for the Spot library.
 
 Package: spot-doc
+Section: doc
 Architecture: all
 Description: documentation for Spot
  Developer documentation for Spot.
+
+Package: python3-spot
+Architecture: any
+Section: python
+Depends: ${shlibs:Depends}, ${misc:Depends}, ${python3:Depends}
+Suggests: ipython3
+Description: python3 binding for spot
+ Spot allows manipulation of omega-automata as well
+ as linear temporal logic (LTL & PSL).