MOBILE-2383 lang: Add en-us language support

src/assets/lang/en-us.json

@@ -0,0 +1,16 @@
+{
+    "addon.mod_assign.markingworkflowstate": "Grading workflow state",
+    "addon.mod_assign.markingworkflowstateinmarking": "In grading",
+    "addon.mod_assign.markingworkflowstatenotmarked": "Not graded",
+    "addon.mod_assign.markingworkflowstatereadyforreview": "Grading completed",
+    "addon.mod_quiz.marks": "Points",
+    "core.courses.notenroled": "You are not enrolled in this course",
+    "core.decsep": ".",
+    "core.labelsep": ":",
+    "core.listsep": ",",
+    "core.login.loginsteps": "For full access to this site, you first need to create an account.",
+    "core.paymentinstant": "Use the button below to pay and be enrolled within minutes!",
+    "core.settings.license": "License",
+    "core.thisdirection": "ltr",
+    "core.user.lastname": "Last name"
+}

src/config.json

@@ -6,7 +6,7 @@
     "versionname" : "3.5.2",
     "cache_expiration_time" : 300000,
     "default_lang" : "en",
-    "languages": {"ar": "عربي", "bg": "Български", "ca": "Català", "cs": "Čeština", "da": "Dansk", "de": "Deutsch", "de-du": "Deutsch - Du", "el": "Ελληνικά", "en": "English", "es": "Español", "es-mx": "Español - México", "eu": "Euskara", "fa": "فارسی", "fi": "Suomi", "fr" : "Français", "he" : "עברית", "hu": "magyar", "it": "Italiano", "ja": "日本語", "ko" : "한국어", "lt" : "Lietuvių", "mr": "मराठी", "nl": "Nederlands", "pl": "Polski", "pt-br": "Português - Brasil", "pt": "Português - Portugal", "ro": "Română", "ru": "Русский", "sr-cr": "Српски", "sr-lt": "Srpski", "sv": "Svenska", "tr" : "Türkçe", "uk" : "Українська", "zh-cn" : "简体中文", "zh-tw" : "正體中文"},
+    "languages": {"ar": "عربي", "bg": "Български", "ca": "Català", "cs": "Čeština", "da": "Dansk", "de": "Deutsch", "de-du": "Deutsch - Du", "el": "Ελληνικά", "en": "English", "en-us": "English - United States","es": "Español", "es-mx": "Español - México", "eu": "Euskara", "fa": "فارسی", "fi": "Suomi", "fr" : "Français", "he" : "עברית", "hu": "magyar", "it": "Italiano", "ja": "日本語", "ko" : "한국어", "lt" : "Lietuvių", "mr": "मराठी", "nl": "Nederlands", "pl": "Polski", "pt-br": "Português - Brasil", "pt": "Português - Portugal", "ro": "Română", "ru": "Русский", "sr-cr": "Српски", "sr-lt": "Srpski", "sv": "Svenska", "tr" : "Türkçe", "uk" : "Українська", "zh-cn" : "简体中文", "zh-tw" : "正體中文"},
     "wsservice" : "moodle_mobile_app",
     "wsextservice" : "local_mobile",
     "demo_sites": {"student": {"url": "https://school.demo.moodle.net", "username": "student", "password": "moodle"}, "teacher": {"url": "https://school.demo.moodle.net", "username": "teacher", "password": "moodle"}},