Testing translations in mailgw.py, update translations, i18n improved i18n.py: translation objects get a _file which is the file that catalog was loaded from. Useful for debugging. mailgw.py: fix code to include roundup.i18n and invoke propert method. GNUMakefile: added roundup.pot target. Also building roundup.pot sets the release version and product code in roundup.pot. Release version from roundup.__init__.py. merged roundup.pot changes into all *.po files. Not sure if the version info in the headers of the .po files is supposed to be updated to match roundup.pot or not. test_mailgw.py: test cases for en and de translations tested. Not sure why I neede to set roundupdb._ and mailgw._, but followed setUp method code and it worked.