Use git archive for dist, use version in doc name

Makefile

@@ -27,8 +27,12 @@ doc: doc/mkexp.pdf
 check:
 	PYTHON=$(PYTHON) $(PYTHON) test.py -v
 
-dist: doc
-	$(PYTHON) setup.py sdist
+# dist: doc
+# 	$(PYTHON) setup.py sdist
+dist:
+	mkdir -p dist
+	git archive --prefix $(package)/ -o dist/$(package).tar.gz HEAD
+	ln -f doc/$(program).pdf dist/$(package).pdf
 
 install: doc
 	$(PIP) install --prefix=$(prefix) .