Various makefile fixes

- Actually use $(PYTHON) in virtualenv creation
 - Make paste.ini if need be
 - distclean is more forgiving if files aren't there
 - clean up virtualenvs also

Makefile.in

@@ -64,6 +64,8 @@ maybe_venved = ./bin/
 maybe_venved_python = ./bin/python
 # Yes, build the virtualenv as a dependency!
 maybe_venv_dep = ./bin/python
+# And to clean up!
+maybe_venv_clean = clean-virtualenv
 
 else
 # --without-virtualenv must have been passed in... don't build
@@ -72,6 +74,8 @@ maybe_venved =
 maybe_venved_python = $(PYTHON)
 # No need for commands to build virtualenv as a dependency!
 maybe_venv_dep = 
+# Nor to clean up!
+maybe_venv_clean = 
 endif
 
 .PHONY: all install uninstall distclean info install-html html \
@@ -88,11 +92,12 @@ mediagoblin.ini:
 	cp --no-clobber mediagoblin.example.ini mediagoblin.ini
 
 # We just symlink the mediagoblin from the appropriate python version
+# Note, we DO clobber paste.ini ...
 paste.ini:
-ifeq ($(USE_PYTHON3),yes)
-	-ln -s paste.py3.ini paste.ini
+ifeq ($(USE_PYTHON3),true)
+	ln -s paste.py3.ini paste.ini
 else
-	-ln -s paste.py2.ini paste.ini
+	ln -s paste.py2.ini paste.ini
 endif
 
 # base-configs: paste.ini mediagoblin.example.ini
@@ -108,7 +113,7 @@ i18n: $(maybe_venv_dep)
 ifneq ($(VIRTUALENV),no)
 ./bin/python:
 	rm -f ./bin/python
-	virtualenv --system-site-packages .
+	virtualenv --system-site-packages --python=$(PYTHON) .
 	./bin/python setup.py develop --upgrade
 
 virtualenv: bin/python
@@ -143,13 +148,12 @@ clean:
 
 
 # Clean up the output of configure
-distclean: 
-	rm -v $(srcdir)/config.log
-	rm -v $(srcdir)/config.status
+distclean: $(maybe_venv_clean)
+	rm -vf $(srcdir)/config.log
+	rm -vf $(srcdir)/config.status
 	rm -rvf $(srcdir)/autom4te.cache
-	rm -v $(srcdir)/aclocal.m4
-	rm -v $(srcdir)/Makefile
-	rm -v $(srcdir)/env
+	rm -vf $(srcdir)/aclocal.m4
+	rm -vf $(srcdir)/Makefile
 
 
 # You can either use the setup.py sdist command or you can roll your own here