Moved most of install logic to makefile

Makefile has again a make install target. The install targets
are split because it is easier for the rules file to install
the files for the different packages inside different destinations
directly.

debian/rules

@@ -2,22 +2,16 @@
 SHELL=sh -e
 
 %:
-	make
-	./driver.py
 	dh $@ --with python3
 
+override_dh_auto_test:
+	./driver.py
+
 clean:
 	rm -rf build *.egg-info
 	dh $@
 
-override_dh_auto_build:
 override_dh_auto_install:
-	for pkg in relational-cli python3-relational relational; do \
-	  python3 setup/$${pkg}.setup.py install --root=$(CURDIR)/debian/$${pkg}; \
-	  rm -rf build; \
-	done
-
-override_dh_install:
-	install -D relational_gui.py debian/relational/usr/bin/relational
-	install -D relational_gui.py debian/relational-cli/usr/bin/relational-cli
-	dh_install
+	DESTDIR=debian/relational-cli make install-relational-cli
+	DESTDIR=debian/python3-relational make install-python3-relational
+	DESTDIR=debian/relational make install-relational