Update README

.editorconfig

@@ -1,5 +1,5 @@
 # EditorConfig for Spring Security
-# see https://github.com/spring-projects/spring-security-saml/blob/master/CONTRIBUTING.md#mind-the-whitespace
+# see https://github.com/spring-projects/spring-security/blob/master/CONTRIBUTING.md#mind-the-whitespace
 
 root = true
 

README.md

@@ -2,10 +2,29 @@
 
 [![Build Status](https://travis-ci.org/spring-projects/spring-security-saml.svg?branch=develop)](https://github.com/spring-projects/spring-security-saml/)
 
+## Upgrade note
+
+This project is being rewritten. There is a base implementation in the 
+[develop](https://github.com/spring-projects/spring-security-saml/tree/develop) including 
+milestone releases in the [milestone](https://repo.spring.io/milestone/org/springframework/security/extensions/spring-security-saml2-core/)
+repository.
+
+In the [develop-3.0](https://github.com/spring-projects/spring-security-saml/tree/develop) branch we are creating a 
+solution that builds on top of the milestones and is better aligned with Spring Security.
+The intent with this branch is to merge it with the [Spring Security](https://github.com/spring-projects/spring-security) 
+project and release as part of Spring Security core.
+
+For that reason, we will not be publishing any official releases of the 2.0.0 milestones, but will maintain it
+until all feature functionality that exists in the milestones are part of Spring Security.
+
+We continue to accept pull request for the 1.0.x branch, but are not actively developing it.
+
+## Introduction
+
 Spring SAML Extension allows seamless inclusion of SAML 2.0 Service Provider capabilities in Spring applications. All products supporting SAML 2.0 in Identity Provider mode (e.g. ADFS 2.0, Shibboleth, OpenAM/OpenSSO, Ping Federate, Okta) can be used to connect with Spring SAML Extension.
 
 ## Code of Conduct
-This project adheres to the Contributor Covenant [code of conduct](CODE_OF_CONDUCT.adoc).
+This project adheres to the Contributor Covenant [code of conduct](CODE_OF_CONDUCT.md).
 By participating, you are expected to uphold this code. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
 
 ## Links