Add a basic form of unsecure authentication (in plain password)

app/src/main/java/com/cappielloantonio/play/subsonic/SubsonicPreferences.java

@@ -7,6 +7,7 @@ import java.util.UUID;
 public class SubsonicPreferences {
     private String serverUrl;
     private String username;
+    private String password;
     private String clientName = "Play";
     private SubsonicAuthentication authentication;
 
@@ -18,6 +19,10 @@ public class SubsonicPreferences {
         return username;
     }
 
+    public String getPassword() {
+        return password;
+    }
+
     public String getClientName() {
         return clientName;
     }
@@ -34,6 +39,10 @@ public class SubsonicPreferences {
         this.username = username;
     }
 
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
     public void setClientName(String clientName) {
         this.clientName = clientName;
     }