Convert pvc-client-cli into a proper Python module

Also fixes up the Debian packaging such that this works how I would
want, with proper module installation while leaving everything else
untouched. Finally implements automatic installation and removal of the
BASH completion for the PVC command.

debian/rules

@@ -1,13 +1,19 @@
 #!/usr/bin/make -f
 # See debhelper(7) (uncomment to enable)
 # output every command that modifies files on the build system.
-#export DH_VERBOSE = 1
+export DH_VERBOSE = 1
 
 %:
-	dh $@
+	dh $@ --with python3
+
+override_dh_python3:
+	cd $(CURDIR)/client-cli; pybuild --system=distutils --dest-dir=../debian/pvc-client-cli/
+	mkdir -p debian/pvc-client-cli/usr/lib/python3
+	mv debian/pvc-client-cli/usr/lib/python3*/* debian/pvc-client-cli/usr/lib/python3/
+	rm -r $(CURDIR)/client-cli/.pybuild $(CURDIR)/client-cli/pvc.egg-info
 
 override_dh_auto_clean:
-	find . -name "__pycache__" -exec rm -r {} \; || true
+	find . -name "__pycache__" -o -name ".pybuild" -exec rm -r {} \; || true
 
 # If you need to rebuild the Sphinx documentation
 # Add spinxdoc to the dh --with line