Fix middleware dev domains, remove duplicate import
[#101] Add google translate widget to partner sites

Add boolean fields to PartnerSites controlling display of UI and Google
translation widgets
Refactor admin UI for PartnerSite, adding the new fields
Add schema migration for the new fields

Add Google translation widget code to partner site base.html
Refactor breadcrumb markup to accomodate none, one or two widgets to the
right

Add class="notranslate" to tags displaying organisation names so Google
doesn't translate them
[#101] Add language fields to Project, Organisation and ProjectUpdate

Add language fields to Project, Organisation and ProjectUpdate. They use settings.LANGUAGES for allowed choices of language and default
to 'en'
Add schema migration for the new fields
Add the new fields in the admin
Add the language field in the ProjectUpdate form for creating new
updates, using the language setting of the associated project as default