Added localisation to manifest.json and _locales/ files for en and es
Populates languages dropdown list from the _locale folder, but the list is ordered incorrectly as it follows the English alphabetised order.
Localisation completed for Spanish. For release once checked by Sandra.
Internationalisation to Spanish checked by Sandra. CSS added. Something has broken the hotkey so not yet for release.
Hotkey working. Now works when selected text is in a frame.
Merge pull request #3 from jamiebull1/localisation

Localisation for Spanish