* added locale/en/LC_MESSAGES/statusnet.po to make it easier to start customizing English texts
* added notes to locale/README about customizing and how to disable languages you haven't customized
* renamed PO templates from *.po to *.pot to match general conventions and reduce confusion for people trying to find which file they're supposed to edit
* need lower case in some places
* update target path
Not in production yet at translatewiki.net - need some Translate extension code changes to get YAML config support for Gettext first.