Added Save and Load Net

- added kryo
- added save/load Net
- added examples in resources
- Main require a file.net

pom.xml

@@ -31,5 +31,10 @@
             <artifactId>commons-math3</artifactId>
             <version>3.6.1</version>
         </dependency>
+        <dependency>
+            <groupId>com.esotericsoftware</groupId>
+            <artifactId>kryo</artifactId>
+            <version>5.6.2</version>
+        </dependency>
     </dependencies>
 </project>