dev-python/matplotlib: Update namespace support

dev-python/matplotlib/matplotlib-9999.ebuild

@@ -253,6 +253,10 @@ python_test() {
 
 python_install() {
 	wrap_setup distutils-r1_python_install
+
+	# mpl_toolkits namespace
+	python_moduleinto mpl_toolkits
+	python_domodule lib/mpl_toolkits/__init__.py
 }
 
 python_install_all() {
@@ -264,4 +268,6 @@ python_install_all() {
 		dodoc -r examples
 		docompress -x /usr/share/doc/${PF}/examples
 	fi
+
+	find "${D}" -name '*.pth' -delete || die
 }