T ispn 3681/update docs

https://issues.jboss.org/browse/ISPN-3682
https://issues.jboss.org/browse/ISPN-3682
https://issues.jboss.org/browse/ISPN-3681
https://issues.jboss.org/browse/ISPN-3674

Also include:
https://github.com/infinispan/infinispan-cachestore-leveldb/pull/11
https://github.com/infinispan/infinispan-cachestore-rest/pull/10