Prefer using goimports over gofmt

bin/fmt.sh

@@ -1,11 +1,13 @@
 #!/usr/bin/env bash
 
+gofmtcmd=`which goimports || echo "gofmt"`
+
 gofiles=$(git diff --name-only --diff-filter=ACM | grep '.go$')
 [ -z "$gofiles" ] && exit 0
 
-unformatted=$(gofmt -l $gofiles)
+unformatted=`$gofmtcmd -l $gofiles`
 [ -z "$unformatted" ] && exit 0
 
 for f in $unformatted; do
-    go fmt "$f"
+    $gofmtcmd -w -l "$f"
 done