Feature/change progress colors (#6)

* Added Settings Actions
* Created App Settings and Repo + Entity
* Code cleanup Time Progress
* Created App Settings Middleware
* Has Progresses ad has Settings loaded
* Created Load and Update Settings reducers
* Added Settings store middleware to renamed store middleware
* Load Default Settings if not Saved. Use Redux AppState to showprogress colors.
Colors are not yet changeable.
* Added ColorPicker for Done and Left Color
Fixed Loading App Settings Bug
* Fixed Version Number
* Fixed Android App Logo
* Extracted Color Settings into Widget
* Fixed Home Settings Tab Layout and Color Settings Button now show Text in complementary color

lib/models/app_settings.dart

@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+import 'package:time_progress_tracker/persistence/app_settings.dart';
+
+@immutable
+class AppSettings {
+  final Color doneColor;
+  final Color leftColor;
+  final Duration duration;
+
+  AppSettings({
+    this.doneColor,
+    this.leftColor,
+    this.duration,
+  });
+
+  factory AppSettings.defaults() =>
+      AppSettings(doneColor: Colors.green, leftColor: Colors.red);
+
+  AppSettings copyWith({
+    Color doneColor,
+    Color leftColor,
+  }) =>
+      AppSettings(
+          doneColor: doneColor ?? this.doneColor,
+          leftColor: leftColor ?? this.leftColor);
+
+  @override
+  int get hashCode => doneColor.hashCode ^ leftColor.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is AppSettings &&
+          runtimeType == other.runtimeType &&
+          doneColor == other.doneColor &&
+          leftColor == other.leftColor;
+
+  AppSettingsEntity toEntity() =>
+      AppSettingsEntity(doneColor.value, leftColor.value);
+
+  static AppSettings fromEntity(AppSettingsEntity entity) => AppSettings(
+      doneColor: Color(entity.doneColorValue),
+      leftColor: Color(entity.leftColorValue));
+}