Update README.md

Author: trevorbicewebdesign

README.md

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 # Woocommerce Slack Notifications for Burning Man E-Commerce
+
+Installing
+You will need to have administrator rights in Slack in order to be able to fully install this plugin.
+1) Install & Activate plugin in Wordpress Plugins
+2) Visit https://api.slack.com/ and log into the burningman account
+3) Click 'Start Building'
+4) After you have named and created your App, click the 'Basic Information' tab and 'Add Features and Functionality' slider
+5) Make sure Incoming Webhooks is turned on 
+6) Click Permissions, Go to Scopes and add the following: chat:write:bot, chat:write:user, incoming-webhook
+7) Install the App, select the channel to output to
+8) Copy the OAuth Access Token
+9) Go to Woocommerce > Settings > Slack Notifications, enter oAuth Access Token and set plugin parameters. Check enable plugin and save.