openteacher - en to pt_BR translation catalogue (3 entries)

note: TRANSLATORS: name of a setting
en: Enable compression
pt_BR: Ativar compressão

note: TRANSLATORS: setting category.
en: Input and output
pt_BR: Entrada e saída

note: TRANSLATORS: setting subcategory; .otmd is a file extension.
en: .otmd saving
pt_BR: Salvar em .otmd
