These instructions should go into #. records in POT files.
Since Launchpad ignores #. records, add the info to the #: record instead.
Add first batch of translator instructions to various sourcefiles.
Implements blueprints "go-gettext" and "code-gettext".
Use tools/extract_pot.py to create new POT files.
Use tools/make_mo.py to create MO files, email template translations and patch the NSIS_Installer.nsi script.