Add Instapaper integration

integration/instapaper/instapaper.go

integration/integration.go

integration/pinboard/pinboard.go

locale/translations.go

locale/translations/fr_FR.json

model/integration.go

server/static/bin.go

server/static/css.go

server/static/css/black.css

server/static/css/common.css

server/static/js.go

server/template/common.go

server/template/html/integrations.html

server/template/views.go

server/ui/controller/integrations.go

server/ui/form/integration.go

sql/schema_version_5.sql

sql/sql.go

storage/integration.go