update to readme

Author: rareddy

README.md

@@ -4,3 +4,6 @@ OData V2 Implementation using Java, Fork of OData4J for bug fixes and small enha
 OData + Rest + Java  ==> shake it ==> o-re-va  (that's it, no other meaning behind it)
 
 This is complete fork of OData4J for the use of Teiid, but I guess anybody who wants to implement OData V2 can use it.
+
+There is no support JPA or JDBC in this version. I always thought they polluted the OData framework, they do not belong in
+the core project. The frameworks needs to be about OData. JPA or JDBC can be additional modules.