Update README.md (#1)

Author: Modest-as

README.md

@@ -6,4 +6,8 @@ Lucene.NET SQL is a library that enables persistance of Lucene index files to SQ
 
 * [x] MySQL
 * [ ] PostgreSQL
-* [ ] SQL Server
+* [ ] SQL Server
+
+## Status
+
+Currently this package is in `alpha` while we wait for `lucene.net 4.8` to be released.