log4j 2 and reworked loadSettings

* replacing all debug/info syso and all syse with log4j 2 logger
* loadSettings() should be 100% bulletproof

src/main/resources/log4j2.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Configuration status="INFO">
+    <Appenders>
+        
+        <Console name="console" target="SYSTEM_OUT">
+            <PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss} [%t] %c{1} - %msg%n" />
+        </Console>
+        
+        <File name="file" fileName="${sys:logFilename}" immediateFlush="true">
+            <PatternLayout pattern="[%-5level] %d{yyyy-MM-dd HH:mm:ss} [%t] %c{1} - %msg%n" />
+        </File>
+    
+    </Appenders>
+    <Loggers>
+        <Root level="debug" additivity="false">
+            <AppenderRef ref="console" />
+            <AppenderRef ref="file"/>
+        </Root>
+    </Loggers>
+</Configuration>