Add i18n translations. (#381)

* Initial prototype.

* Add support for i18n in more places.

src/locales/en.json

@@ -0,0 +1,16 @@
+{
+    "titles": {
+        "trending": "Trending",
+        "login": "Login",
+        "register": "Register",
+        "feed": "Feed",
+        "preferences": "Preferences"
+    },
+    "player": {
+        "watch_on": "Watch on"
+    },
+    "actions": {
+        "subscribe": "Subscribe",
+        "unsubscribe": "Unsubscribe"
+    }
+}

src/locales/fr.json

@@ -0,0 +1,9 @@
+{
+    "titles": {
+        "trending": "Tendances",
+        "login": "Connexion",
+        "register": "S'inscrire",
+        "feed": "Abonnements",
+        "preferences": "Préférences"
+    }
+}