org: add installation instructions

* doc/org/install.org: New file.
* doc/Makefile.am: Add it.
* doc/org/index.org: Link to it.
* doc/org/setup.org: Add macro for
various version numbers.
* doc/org/tools.org: Update version number.
* NEWS, README, bench/ltl2tgba/README, debian/control,
debian/copyright: Update URLs to website.

debian/control

@@ -4,7 +4,7 @@ Priority: optional
 Maintainer: Alexandre Duret-Lutz <adl@lrde.epita.fr>
 Build-Depends: debhelper (>= 9), python3-all-dev
 Standards-Version: 3.9.6
-Homepage: http://spot.lip6.fr/
+Homepage: http://spot.lrde.lip6.fr/
 
 Package: spot
 Architecture: any

debian/copyright

@@ -1,6 +1,6 @@
 Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: spot
-Source: http://spot.lip6.fr/dl/
+Source: http://spot.lrde.epita.fr/dload/spot/
 
 Files: *
 Copyright: 2003-2007 Laboratoire d'Informatique de Paris 6 (LIP6)