Updated the description for rqlite

rqlite has broadened its goals, and this description is a better fit.

I am the creator of rqlite.

README.md

@@ -255,7 +255,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 * [levigo](https://github.com/jmhodges/levigo) - Levigo is a Go wrapper for LevelDB.
 * [pREST](https://github.com/nuveo/prest) - Serve a RESTful API from any PostgreSQL database.
 * [prometheus](https://github.com/prometheus/prometheus) - Monitoring system and time series database.
-* [rqlite](https://github.com/rqlite/rqlite) - Replicated SQLite, using Raft consensus.
+* [rqlite](https://github.com/rqlite/rqlite) - The lightweight, distributed, relational database built on SQLite.
 * [tidb](https://github.com/pingcap/tidb) - TiDB is a distributed SQL database. Inspired by the design of Google F1.
 * [tiedot](https://github.com/HouzuoGuo/tiedot) - Your NoSQL database powered by Golang.
 * [Tile38](https://github.com/tidwall/tile38) - A geolocation DB with spatial index and realtime geofencing.