bug fix 1.0 (android logo, old device, firstname, exercise save)

lib/model/auth.dart

@@ -43,6 +43,7 @@ class Auth {
   Customer userLoggedIn;
   bool firstLoad = true;
   List<ExerciseType> _exerciseTypes;
+  List deviceLanguages;
 
   factory Auth() {
     return _singleton;

lib/model/customer.dart

@@ -1,7 +1,7 @@
 class Customer {
    String name;
    String email;
-   String firstName;
+   String firstname;
    String sex;
    int age;
    String active;
@@ -18,7 +18,7 @@ class Customer {
 
   Customer({this.customerId,
     this.name,
-    this.firstName,
+    this.firstname,
     this.email,
     this.sex,
     this.age,
@@ -36,7 +36,7 @@ class Customer {
   Customer.fromJson(Map json) {
     this.customerId = json['customerId'];
     this.name = json['name'];
-    this.firstName = json['firstname'];
+    this.firstname = json['firstname'];
     this.email = json['email'];
     this.sex = json['sex'];
     this.age = json['age'];
@@ -52,7 +52,7 @@ class Customer {
    Map<String, dynamic> toJson() =>
        {
          "name": name,
-         "firstName": firstName,
+         "firstname": firstname,
          "email": email,
          "age": age,
          "sex": sex,