Add blog service & follow model changes in tags/posts (#22)

blog/handler/blog.go

@@ -0,0 +1,30 @@
+package handler
+
+import (
+	"context"
+
+	comments "github.com/micro/services/blog/comments/proto"
+	posts "github.com/micro/services/blog/posts/proto"
+	proto "github.com/micro/services/blog/proto"
+	tags "github.com/micro/services/blog/tags/proto"
+)
+
+type Blog struct {
+	ps posts.PostsService
+	cs comments.CommentsService
+	ts tags.TagsService
+}
+
+func NewBlog(ps posts.PostsService,
+	cs comments.CommentsService,
+	ts tags.TagsService) *Blog {
+	return &Blog{
+		ps: ps,
+		cs: cs,
+		ts: ts,
+	}
+}
+
+func (e *Blog) Latest(ctx context.Context, req *proto.LatestRequest, rsp *proto.LatestResponse) error {
+	return nil
+}