NOJIRA - updating README files

Author: slavisa-baeldung

core-java/README.md

@@ -38,3 +38,4 @@
 - [Guide to the Fork/Join Framework in Java](http://www.baeldung.com/java-fork-join)
 - [How to Print Screen in Java](http://www.baeldung.com/print-screen-in-java)
 - [How to Convert String to different data types in Java](http://www.baeldung.com/java-string-conversions)
+- [Introduction to Java Generics](http://www.baeldung.com/java-generics)

spring-session/README.md

@@ -0,0 +1,6 @@
+=========
+
+## Spring Session Examples
+
+### Relevant Articles: 
+- [Introduction to Spring Session](http://www.baeldung.com/spring-session)