trim logins, change second secretary and add person mailto field

src/main/java/de/jottyfan/camporganizer/module/registration/ProfileBean.java

@@ -32,7 +32,7 @@ public class ProfileBean implements Serializable {
 	}
 
 	public String getUsername() {
-		return username;
+		return username == null ? null : username.trim();
 	}
 
 	public void setUsername(String username) {