- Supported languages now all centralized.

Now the flow for adding a new language is just:
1.Add a new language entry to `res/common/lang/langs.json`.

And for translating it's just:
1. Run `gulp translate` (extracts all the strings).
2. Open `/res/common/lang/po/stf.pot` in PoEdit and translate.
3. Run `gulp translate` again (creates a json based on the new `po` file).

res/common/lang/translations/stf.es.json

@@ -1 +0,0 @@
-{"es":{"Carrier":"Correa","Clear":"","Control":"","Details":"","Device Port":"","Devices":"","Enable notifications":"","Example: 3000":"","Filter":"","Help":"ヘルプ","Language":"","Local Settings":"","Location":"","Model":"","Native":"","No devices connected":"","Notifications":"","OS":"","Product":"","Refresh":"","Release Date":"","Reset Settings":"","Saved to: {{savedTo}}":"","Screen":"","Settings":"","Shell":"","Start Using":"","Status":"","Stop Using":"","Target IP / Hostname":"","Target Port":"","Target host (detect if blank)":"","Use":"","User":"","Web":""}}