Added Getters for Models

lib/models/mood.dart

@@ -8,6 +8,7 @@ class Mood implements DatabaseRecord {
   Mood(this._moodValue, this._comment, this._date);
 
   DateTime get date => _date;
+  int get moodValue => _moodValue;
 
   @override
   factory Mood.fromDatabase(Map<String, dynamic> map) {

lib/models/relapse.dart

@@ -7,6 +7,9 @@ class Relapse implements DatabaseRecord {
 
   Relapse(this._category, this._comment, this._date);
 
+  String get category => _category;
+  DateTime get date => _date;
+
   @override
   factory Relapse.fromDatabase(Map<String, dynamic> map) {
     DateTime date = DateTime.parse(map['date']);

lib/models/sleep.dart

@@ -12,6 +12,7 @@ class Sleep implements DatabaseRecord {
       this._wokeUpAt);
 
   DateTime get date => _date;
+  int get sleepQualitiyValue => _sleepQualityValue;
 
   @override
   factory Sleep.fromDatabase(Map<String, dynamic> map) {

lib/models/workout.dart

@@ -8,6 +8,8 @@ class Workout implements DatabaseRecord {
   Workout(this._motivationBefore, this._motivationAfter, this._workoutDate);
 
   DateTime get date => _workoutDate;
+  int get motivationBefore => _motivationBefore;
+  int get motivationAfter => _motivationAfter;
 
   @override
   factory Workout.fromDatabase(Map<String, dynamic> map) {