Add anchor guide deprecation notice (#555)

* Update readme.md

add deprecation warning

* Update 2-bridge-server.md

add deprecation notice

* Update readme.md

fix link path

* Update 2-bridge-server.md

fix link path

* Update 3-federation-server.md

add deprecation notice

* Update 4-compliance-server.md

* Update 5-conclusion.md

* Update readme.md

* Update 2-bridge-server.md

* Update 3-federation-server.md

* Update 4-compliance-server.md

* Update 5-conclusion.md

* Use absolute URLs

Co-authored-by: Carl Vitullo <vcarl@users.noreply.github.com>

Author: rice2000

guides/anchor/2-bridge-server.md

@@ -5,6 +5,10 @@ sequence:
   next: 3-federation-server.md
 ---
 
+## Deprecation Notice
+
+This guide explains how to set up a Stellar anchor service using a legacy flow outlined in [SEP-0003](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0003.md).  For most use cases, we actually recommend the workflow specified in [SEP-0024](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md).  We are working on new documentation that explains that workflow, and it will be ready soon.  In the meantime, check the [Basic Anchor Implementation section](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#basic-anchor-implementation) included in SEP-0024.
+
 Stellar.org maintains a [bridge server](https://github.com/stellar/bridge-server/blob/master/readme_bridge.md), which makes it easier to use the federation and compliance servers to send and receive payments. When using the bridge server, the only code you need to write is a private service to receive payment notifications and respond to regulatory checks from the bridge and compliance servers.
 
 ![Payment flow diagram](assets/anchor-send-payment-basic-bridge.png)

guides/anchor/3-federation-server.md

@@ -4,6 +4,9 @@ sequence:
   previous: 2-bridge-server.md
   next: 4-compliance-server.md
 ---
+## Deprecation Notice
+
+This guide explains how to set up a Stellar anchor service using a legacy flow outlined in [SEP-0003](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0003.md).  For most use cases, we actually recommend the workflow specified in [SEP-0024](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md).  We are working on new documentation that explains that workflow, and it will be ready soon.  In the meantime, check the [Basic Anchor Implementation section](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#basic-anchor-implementation) included in SEP-0024.
 
 When testing the bridge server, we added a `memo` to the transaction in order to identify what customer account to credit. However, other people and organizations using Stellar might not know they need to do that. How do they find out?
 

guides/anchor/4-compliance-server.md

@@ -5,6 +5,10 @@ sequence:
   next: 5-conclusion.md
 ---
 
+## Deprecation Notice
+
+This guide explains how to set up a Stellar anchor service using a legacy flow outlined in [SEP-0003](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0003.md).  For most use cases, we actually recommend the workflow specified in [SEP-0024](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md).  We are working on new documentation that explains that workflow, and it will be ready soon.  In the meantime, check the [Basic Anchor Implementation section](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#basic-anchor-implementation) included in SEP-0024.
+
 The task of an anchor is handling regulatory compliance, like Anti-Money Laundering (<abbr title="Anti-Money Laundering">AML</abbr>). To accomplish that, you should use the [Stellar compliance protocol](../compliance-protocol.md), a standard way to exchange compliance information and pre-approve a transaction with another financial institution.
 
 You can write your own server that matches the compliance protocol, but Stellar.org also provides a [compliance server](https://github.com/stellar/bridge-server/blob/master/readme_compliance.md) that takes care of most of the work for you.

guides/anchor/5-conclusion.md

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   previous: 4-compliance-server.md
 ---
 
+## Deprecation Notice
+
+This guide explains how to set up a Stellar anchor service using a legacy flow outlined in [SEP-0003](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0003.md).  For most use cases, we actually recommend the workflow specified in [SEP-0024](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md).  We are working on new documentation that explains that workflow, and it will be ready soon.  In the meantime, check the [Basic Anchor Implementation section](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#basic-anchor-implementation) included in SEP-0024.
+
+
 Congratulations! If you’ve made it to this point, you should now have a working bridge server, federation server, and compliance server, with the ability to make and receive secure, sanctioned payments on the Stellar network.
 
 ## Testing

guides/anchor/readme.md

@@ -4,6 +4,10 @@ sequence:
   next: 2-bridge-server.md
 ---
 
+## Deprecation Notice
+
+This guide explains how to set up a Stellar anchor service using a legacy flow outlined in [SEP-0003](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0003.md).  For most use cases, we actually recommend the workflow specified in [SEP-0024](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md).  We are working on new documentation that explains that workflow, and it will be ready soon.  In the meantime, check the [Basic Anchor Implementation section](https://github.com/stellar/stellar-protocol/blob/master/ecosystem/sep-0024.md#basic-anchor-implementation) included in SEP-0024.
+
 Anchors are entities that people trust to hold their deposits and [issue credits](../issuing-assets.md) into the Stellar network for those deposits. All money transactions in the Stellar network (except lumens) occur in the form of credit issued by anchors, so anchors act as a bridge between existing currencies and the Stellar network. Most anchors are organizations like banks, savings institutions, farmers’ co-ops, central banks, and remittance companies.
 
 Before continuing, you should be familiar with: