Fixed a string and updated README.md

.idea/misc.xml

@@ -53,7 +53,7 @@
     <ConfirmationsSetting value="0" id="Add" />
     <ConfirmationsSetting value="0" id="Remove" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

README.md

@@ -1,8 +1,9 @@
 ## Privacy Friendly Sudoku
 
-Privacy Friendly Sudoku is a logic based game.
+Privacy Friendly Sudoku is a logic based game and belongs to the group of Privacy Friendly Apps developed by Technische Universität Darmstadt, Germany.
 
-It does not use any permission, as the app can provide its full functionality without the usage of permissions. 
+This app is optimized regarding the user's privacy. It doesn't use any tracking mechanisms, neither it displays any advertisement.
+Also it does not use any permission, as the app can provide its full functionality without the usage of permissions. 
 It also does neither include advertisement nor tracking mechanisms.
 
 ## Motivation 
@@ -10,12 +11,38 @@ It also does neither include advertisement nor tracking mechanisms.
 As it is part of the Privacy Friendly Apps developed by the SECUSO research group of the Technische 
 Universtität Darmstadt in Germany it is optimized due to user's privacy.
 
-## Installation
 
-Further development requires Android Studio.
+## Download and more Information
+
+Further development requires Android Studio, we recommend to use at least version 2.1.3
+
+### API Reference
+
+Mininum SDK: 16
+Target SDK: 24 
 
 ## License
 
+
 Privacy Friendly Sudoku is lisenced under the GPLv3.
+
+This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
+
+The icons used in the nagivation drawer are licensed under the CC BY 2.5. In addition to them the app uses icons from Google Design Material Icons licensed under Apache License Version 2.0. All other images (the logo of Privacy Friendly Apps, the SECUSO logo and the header in the navigation drawer) copyright Technische Universtität Darmstadt (2016).
+
 The icons ic_trophy_award_black_48dp and ic_trophy_black_48dp are licensed under the Sil Open Font License Version 1.1.
 
+## Contributors
+
+App-Icons:
+Markus Hau
+
+Github-Users: <br />
+Kamuno <br />
+Gongxter <br />
+
+

app/src/main/res/values-es/strings.xml

@@ -79,4 +79,5 @@
     <string name="pref_timer_reset">Resetear Tiempo</string>
     <string name="pref_timer_reset_summary">El tiempo se resetea tambien, cuando el tablero se resetea.</string>
     <string name="welcome">Bienvenido a Privacy Friendly Sudoku.</string>
+    <string name="about_author_contributors">" "</string>
 </resources>

app/src/main/res/values-fr/strings.xml

@@ -79,4 +79,5 @@
     <string name="pref_timer_reset">Réinitialiser le minuteur</string>
     <string name="pref_timer_reset_summary">Aussi réinitialiser le minuteur en réinitialisant le jeux en cours.</string>
     <string name="welcome">Bienvenue à Privacy Friendly Sudoku.</string>
+    <string name="about_author_contributors">" "</string>
 </resources>

app/src/main/res/values-ru/strings.xml

@@ -79,4 +79,5 @@
     <string name="pref_timer_reset">Сброс таймера</string>
     <string name="pref_timer_reset_summary">Сброс таймера при сбросе доски.</string>
     <string name="welcome">Добро пожаловать в Privacy Friendly Sudoku.</string>
+    <string name="about_author_contributors">" "</string>
 </resources>

app/src/main/res/values-zh/strings.xml

@@ -79,5 +79,6 @@
     <string name="pref_timer_reset">定时复位</string>
     <string name="pref_timer_reset_summary">定时复位如果重置领域</string>
     <string name="welcome">欢迎</string>
+    <string name="about_author_contributors">" "</string>
 
 </resources>

app/src/main/res/values/strings.xml

@@ -138,6 +138,4 @@
     <string name="help_privacyInfo">Privacy Info</string>
     <string name="help_permissions">Permissions</string>
     <string name="help_permissions_summary">Privacy Friendly Sudoku does not use any permissions.</string>
-
-    <string name="action_settings">Settings</string>
 </resources>