Aisle/Features/Language packs

Goals	,|x|Serves Aisle goal::x}}
Paradigms	,|x|Affects Aisle paradigm::x}}
Use Cases	,|x|Affects Aisle use case::x}}
Requirements	,|x|Serves Aisle requirement::x}}
Phase	In Aisle phase::
Milestone	,|x|Part of Aisle milestone::x}}

Language packs should be

• compatible with the build the tester is using.
  • This needs extra work in the addons manager for nightly and aurora
• updating when there's new localization work or an incompatible build
• restartless
• working for more testers than just one

This requires a bit of server-side infrastructure to run a langpack build against the repo and revision that maps to the build a tester is using.

I expect the add-on ID to be bound to the repo the contributor is working on.