Reorganized imports as per conversation in pr #35

Author: Olve S. Hansen

stackdriver_exporter.go

@@ -7,14 +7,15 @@ import (
 	"strings"
 
 	"github.com/PuerkitoBio/rehttp"
-	"github.com/frodenas/stackdriver_exporter/collectors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/common/log"
 	"github.com/prometheus/common/version"
 	"golang.org/x/net/context"
 	"golang.org/x/oauth2/google"
 	"google.golang.org/api/monitoring/v3"
 	"gopkg.in/alecthomas/kingpin.v2"
+
+	"github.com/frodenas/stackdriver_exporter/collectors"
 )
 
 var (