restored some information that got lost

Author: Max Scholz

README.MD

@@ -1,3 +1,4 @@
+[![Build Status](https://travis-ci.org/Staffbase/plugins-sdk-nodejs.svg?branch=master)](https://travis-ci.org/Staffbase/plugins-sdk-nodejs) [![Greenkeeper badge](https://badges.greenkeeper.io/Staffbase/plugins-sdk-nodejs.svg)](https://greenkeeper.io/)
 # Staffbase Plugins SDK for Node.js.
 
 If you are developing your own plugin for your Staffbase app we describe the authentication flow of a plugin at https://developers.staffbase.com/api/plugin-sso/. While this documentation just covers the conceptual ideas of the interface of plugins though – the so called Plugin SSO – we want to provide a library to help you develop your first plugin for Staffbase even faster. This SDK provides the basic functionality to parse and verify a provided token for Node.js.

docs/API.MD

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+## Classes
+Global | Description
+------ | -----------
+SSOToken | SSOToken Class. Used as an interface to decode the Staffbase SSO Token.
+SSOTokenData : SSOTokenData | SSOTokenData Class used to host the token data values and provide getter functions to extract correspinding values.
+
+## Functions
+Global | Description
+------ | -----------
+ssoMiddleWare(secret, audience) ⇒ function | Mountable express middleware functions
+readKeyFile(path, cb) ⇒ String | Reads public key file from the specified path and returns a string representation
+of the key to be used to decode token.
+asCert(cert, type) ⇒ string | asCert converts a binary encoded key to PKCS8 format
+isPKCS8Format(key, type) ⇒ Boolean | Checks if the format of the key is similar to PKCS8 Format.
+transformKeyToFormat(key, type) ⇒ String | Transforms the provided key to PKCS8 format for supported jwt algorithm.
+
 ## SSOToken
 SSOToken Class. Used as an interface to decode the Staffbase SSO Token.