use pip for make {install,develop} (#999)

Makefile

@@ -56,13 +56,13 @@ install-manpages: $(MANPAGES)
 	install -D -t $(MANDIR) $(MANPAGES)
 
 install: install-mnexec install-manpages
-	$(PYTHON) setup.py install
+	$(PYTHON) -m pip install .
 
 develop: $(MNEXEC) $(MANPAGES)
 # 	Perhaps we should link these as well
 	install $(MNEXEC) $(BINDIR)
 	install $(MANPAGES) $(MANDIR)
-	$(PYTHON) setup.py develop
+	$(PYTHON) -m pip install -e . --no-binary
 
 man: $(MANPAGES)