Merge branch 'master' of https://github.com/StanicakFilip/Mobile

Frontend/app/src/main/AndroidManifest.xml

Frontend/app/src/main/ic_launcher-playstore.png

.../src/main/java/com/example/mobileapp/MemberFragement.java

...p/src/main/java/com/example/mobileapp/MemberFragment.java

...va/com/example/mobileapp/Recycler_View_Adapter_Group.java

.../example/mobileapp/Recycler_View_Adapter_Transaction.java

...ava/com/example/mobileapp/Recycler_View_Adapter_User.java

.../app/src/main/java/com/example/mobileapp/Single_Trip.java

...app/src/main/java/com/example/mobileapp/Start_Screen.java

...main/java/com/example/mobileapp/TransactionFragement.java

.../main/java/com/example/mobileapp/TransactionFragment.java

...main/java/com/example/mobileapp/Trip_Overview_Screen.java

Frontend/app/src/main/res/drawable-hdpi/admin_crown.png

Frontend/app/src/main/res/drawable-hdpi/get_symbol.png

Frontend/app/src/main/res/drawable-hdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable-hdpi/splitter.png

Frontend/app/src/main/res/drawable-mdpi/admin_crown.png

Frontend/app/src/main/res/drawable-mdpi/get_symbol.png

Frontend/app/src/main/res/drawable-mdpi/no_admin_crown.png

Frontend/app/src/main/res/drawable-mdpi/splitter.png