Generate new pot and po files

Makefile

@@ -59,6 +59,8 @@ release:
 	sed -i s/version\ =\ \'[0-9]\.[0-9]\.[0-9]\'/version\ =\ \'$(VERSION)\'/ docs/source/conf.py
 	sed -i s/release\ =\ \'[0-9]\.[0-9]\.[0-9]\'/release\ =\ \'$(VERSION)\'/ docs/source/conf.py
 	sed -i "s/(Unreleased)/(`date +%Y-%m-%d`)/" docs/CHANGES.rst
+	make pot
+	make po
 	make build
 
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