Add Slack support

vendor/github.com/nlopes/slack/examples/files/files.go

@@ -0,0 +1,30 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/nlopes/slack"
+)
+
+func main() {
+	api := slack.New("YOUR_TOKEN_HERE")
+	params := slack.FileUploadParameters{
+		Title: "Batman Example",
+		//Filetype: "txt",
+		File: "example.txt",
+		//Content:  "Nan Nan Nan Nan Nan Nan Nan Nan Batman",
+	}
+	file, err := api.UploadFile(params)
+	if err != nil {
+		fmt.Printf("%s\n", err)
+		return
+	}
+	fmt.Printf("Name: %s, URL: %s\n", file.Name, file.URL)
+
+	err = api.DeleteFile(file.ID)
+	if err != nil {
+		fmt.Printf("%s\n", err)
+		return
+	}
+	fmt.Printf("File %s deleted successfully.\n", file.Name)
+}