v1.3.0

Added how to get token in README

Author: takameron

README.md

@@ -1,6 +1,28 @@
 # slack-dump
 Generate an export of Channel, Private Group and / or Direct Message history and export it as a ZIP file compatible with Slack's import tool.
 
+## Token
+
+1. Visit https://api.slack.com/
+2. Click "Create an app"
+3. Select "From scratch"
+4. Input App Name and pick a workspace
+5. Click "Features" → "OAuth & Permissions" of sidebar
+6. Go to "Scopes" and set as below for Bot tokens and User tokens
+
+* channels:read
+* groups:read
+* im:read
+* mpim:read
+* channels:history
+* groups:history
+* im:history
+* mpim:history
+
+7. Go to "OAuth Tokens for Your Workspace" and click "Install to Workspace"
+8. Accept
+9. OAuth Token is displayed in "OAuth Tokens for Your Workspace"
+
 ## Usage
 
 ```
@@ -13,19 +35,19 @@ USAGE:
    main [global options] command [command options] [arguments...]
 
 VERSION:
-   1.2.1
+   1.3.0
 
 AUTHORS:
    Joe Fitzgerald <jfitzgerald@pivotal.io>
    Sunyong Lim <dicebattle@gmail.com>
    Yoshihiro Misawa <myoshi321go@gmail.com>
-   takameron <contact@takameron.info>
+   takameron <tech@takameron.info>
 
 COMMANDS:
    help, h  Shows a list of commands or help for one command
 
 GLOBAL OPTIONS:
-   --token value, -t value   a Slack API token: (see: https://api.slack.com/web) [$SLACK_API_TOKEN]
+   --token value, -t value   a Slack API token: (see: https://api.slack.com/apis) [$SLACK_API_TOKEN]
    --output value, -o value  Output directory path. Default: current directory path [$]
    --help, -h                show help (default: false)
    --version, -v             print the version (default: false)

main.go

@@ -64,7 +64,7 @@ func main() {
 			Email: "tech@takameron.info",
 		},
 	}
-	app.Version = "1.2.1"
+	app.Version = "1.3.0"
 	app.Action = func(c *cli.Context) error {
 		token := c.String("token")
 		if token == "" {