WTF-748 Fixes and improves module templating (#786)

Fixes and improves the module templating for creating new bare-bones
text widgets.

This command:

    WTF_WIDGET_NAME=MyNewWidget go generate -run=text

now properly generates:

    * the module directory in the /modules directory
    * the widget.go file
    * the settings.go file

with no linter warnings or errors.

Signed-off-by: Chris Cummer <chriscummer@me.com>

modules/digitalocean/widget.go

@@ -28,7 +28,7 @@ func (t *tokenSource) Token() (*oauth2.Token, error) {
 
 /* -------------------- Widget -------------------- */
 
-// Widget is the container for transmission data
+// Widget is the container for droplet data
 type Widget struct {
 	view.KeyboardWidget
 	view.ScrollableWidget