Rename slave package to driver

The package contains driver code that was supplemented with additional slave commands.

reader/enhanced_reader.go

@@ -9,7 +9,7 @@ import (
 	"github.com/juju/errors"
 	"github.com/localhots/bocadillo/binlog"
 	"github.com/localhots/bocadillo/mysql"
-	"github.com/localhots/bocadillo/mysql/slave"
+	"github.com/localhots/bocadillo/mysql/driver"
 	"github.com/localhots/bocadillo/reader/schema"
 )
 
@@ -29,7 +29,7 @@ type EnhancedRowsEvent struct {
 }
 
 // NewEnhanced creates a new enhanced binary log reader.
-func NewEnhanced(dsn string, sc slave.Config) (*EnhancedReader, error) {
+func NewEnhanced(dsn string, sc driver.Config) (*EnhancedReader, error) {
 	r, err := New(dsn, sc)
 	if err != nil {
 		return nil, err

reader/reader.go

@@ -5,12 +5,12 @@ import (
 
 	"github.com/juju/errors"
 	"github.com/localhots/bocadillo/binlog"
-	"github.com/localhots/bocadillo/mysql/slave"
+	"github.com/localhots/bocadillo/mysql/driver"
 )
 
 // Reader is a binary log reader.
 type Reader struct {
-	conn     *slave.Conn
+	conn     *driver.Conn
 	state    binlog.Position
 	format   binlog.FormatDescription
 	tableMap map[uint64]binlog.TableDescription
@@ -34,8 +34,8 @@ var (
 )
 
 // New creates a new binary log reader.
-func New(dsn string, sc slave.Config) (*Reader, error) {
-	conn, err := slave.Connect(dsn, sc)
+func New(dsn string, sc driver.Config) (*Reader, error) {
+	conn, err := driver.Connect(dsn, sc)
 	if err != nil {
 		return nil, errors.Annotate(err, "establish slave connection")
 	}