support multiple gettext domains

[themightychris]

Instead of 'site' as the default gettext domain, use a configurable default domain. Laddr's default domain could be "laddr" with a laddr.po file containing all the translations for the app itself.

Then when a brigade wants to translate some of their brochure content, they could create a separate .po file and not have to deal with merging upstream translation changes

[themightychris]

Instead of supporting separate domains the locale compiler could combine all the .po files into a single versioned site.mo file. Numeric prefixes could be used to order them and make precedence explicit. This would avoid the complication of specifying various domains when calling gettext

[schlos]

+1