replace POC with implementation

Author: vikhari

README.md

@@ -11,7 +11,7 @@ Alpha status implies:
 - Designation of versions of CASE and UCO the project supports.
 - Follow Semantic Versioning (SEMVER).
 
-This POC is not ontology-correct! However, it attempts to adhere to v0.1.0 of CASE.
+This implementation is not ontology-correct! However, it attempts to adhere to v0.1.0 of CASE.
 This is an implementation of exporting [plaso](https://github.com/log2timeline/plaso) storage files into an
 RDF graph following the [CASE](https://github.com/casework/CASE) ontology.