162 Add configuration for i18next

i18n/en.json

+{
+  "components": {
+    "Home": {
+      "addDataForToday": "add data for today",
+      "noPrediction": "As soon as you have tracked 3 menstrual cycles, drip will make predictions for the next ones."
+    }
+  }  
+}

i18n/i18n.js

+import i18n from 'i18next';
+import { initReactI18next } from 'react-i18next';
+
+// translation files
+import en from './en.json';
+
+const resources = {
+    en: { translation: en },
+  };
+
+
+  i18n
+  // pass the i18n instance to react-i18next.
+  .use(initReactI18next)
+  // init i18next
+  // for all options read: https://www.i18next.com/overview/configuration-options
+  .init({
+    resources,
+    fallbackLng: 'en',
+    debug: true,
+
+    interpolation: {
+      escapeValue: false, // not needed for react as it escapes by default
+    }
+  });
+
+
+export default i18n;

index.js

 import { AppRegistry } from 'react-native'
 import AppWrapper from './components/app-wrapper'
+import './i18n/i18n';
 
 AppRegistry.registerComponent('drip', () => AppWrapper)
\ No newline at end of file