#63 adding mail configuration class

gemeinsamforschen/src/main/java/unipotsdam/gf/config/GFMailConfig.java

+package unipotsdam.gf.config;
+
+public class GFMailConfig {
+
+    public final static String SMTP_HOST = "";
+    public final static String SMTP_PORT = "";
+    public final static String SMTP_USERNAME = "";
+    public final static String SMTP_PASSWORD = "";
+}