do not keep ref of inverse matrix for calibration, small packaging changes for pipy

setup.py

@@ -2,16 +2,25 @@ from distutils.core import setup
 from distutils.command.install_data import install_data
 
 
-import make_deb
-
-setup (name = "python-urx", 
-        version = make_deb.vcsstring,
+setup (name = "urx", 
+        version = ".8.0",
         description = "Python library to control an UR robot",
         author = "Olivier Roulet-Dubonnet",
+        author_email = "olivier.roulet@gmail.com",
         url = 'https://github.com/oroulet/python-urx',
         packages = ["urx"],
         provides = ["urx"],
         license = "GNU General Public License v3",
+
+        classifiers = [
+            "Programming Language :: Python",
+            "Programming Language :: Python :: 3",
+            "Development Status :: 4 - Beta",
+            "Intended Audience :: Developers",
+            "Operating System :: OS Independent",
+            "Topic :: System :: Hardware :: Hardware Drivers",
+            "Topic :: Software Development :: Libraries :: Python Modules",
+        ]
         )