feature(translation): add Spanish translation (#442)

* Spanish file (first translation)

* Languague related files

* Fix

* Replaced double quotes

* Improved spanish translation

* Minor improvements (spanish translation)

* Some improvements (spanish translation)

The GIT reserved words are kept without translate.

* Removed english phrase

* Updated analytics title

* Updated spanish translation

* Added missing fields (spanish translation)

* Replaced tabs (spanish translation)

* Changed some words to downcase (spanish translation)

Author: khvilaboa

src/auth/screens/language-settings.js

@@ -54,4 +54,9 @@ export default [
     emojiCode: ':flag-de:',
     name: 'Deutsch',
   },
+  {
+    code: 'es',
+    emojiCode: ':flag-es:',
+    name: 'Español',
+  },
 ];

src/locale/index.js

@@ -1,7 +1,6 @@
 import I18n from 'react-native-i18n';
-
 import { common } from 'config';
-import { en, fr, nl, pt, ptBr, tr, ru, eo, gl, pl, de } from './languages';
+import { en, fr, nl, pt, ptBr, tr, ru, eo, gl, pl, de, es } from './languages';
 
 I18n.fallbacks = true;
 I18n.defaultLocale = common.defaultLocale;
@@ -14,6 +13,7 @@ I18n.translations = {
   pt,
   'pt-br': ptBr,
   ru,
+  es,
   eo,
   gl,
   pl,