Move driver.go to same package as main.go

main.go does not need to specify an import for the driver anymore and
thus "go get" will not download the driver to src/github.com/.../driver.go
anymore (previously it used src/github.com/.../driver.go instead of
driver/driver.go to build the binary locally).

Author: monochromata

driver/driver.go driver.godriver/driver.go renamed to driver.go

@@ -1,4 +1,4 @@
-package driver
+package main
 
 import (
 	"fmt"
@@ -75,7 +75,7 @@ func (d *Driver) GetCreateFlags() []mcnflag.Flag {
 		mcnflag.StringFlag{
 			EnvVar: "HETZNER_API_TOKEN",
 			Name:   flagApiToken,
-			Usage:  "Project-specific Hetzner API token",
+			Usage:  "Project-specific Hetzner API token (FOO)",
 			Value:  "",
 		},
 

main.go

@@ -2,9 +2,8 @@ package main
 
 import (
 	"github.com/docker/machine/libmachine/drivers/plugin"
-	"github.com/jonasprogrammer/docker-machine-driver-hetzner/driver"
 )
 
 func main() {
-	plugin.RegisterDriver(driver.NewDriver())
+	plugin.RegisterDriver(NewDriver())
 }