readme: updated package description to match the description in gocql readme

doc.go

@@ -2,10 +2,10 @@
 // Use of this source code is governed by a ALv2-style
 // license that can be found in the LICENSE file.
 
-// Package gocqlx is a productivity toolkit for ScyllaDB and Apache Cassandra®.
-// It's an extension of `gocql`, similar to what `sqlx` is to `database/sql`.
-//
-// It contains wrappers over gocql types that provide convenience methods which
-// are useful in the development of database driven applications. Under the
-// hood it uses sqlx/reflectx package so sqlx models will also work with gocqlx.
+// Package gocqlx is an idiomatic extension to gocql that provides usability
+// features. With gocqlx you can bind the query parameters from maps and
+// structs, use named query parameters (:identifier) and scan the query results
+// into structs and slices. It comes with a fluent and flexible CQL query
+// builder that supports full CQL spec, including BATCH statements and custom
+// functions.
 package gocqlx