Introduce a changelog

Add in a file to collect a change log for the document over time.

Signed-off-by: Al Stone <[email protected]>

Makefile

@@ -5,7 +5,7 @@
 ASCIIDOCTOR = asciidoctor
 PLATFORM_SPEC = riscv-platform-spec
 PANDOC = pandoc
-PARTS = contributors.adoc licensing.adoc
+PARTS = changelog.adoc contributors.adoc licensing.adoc
 
 # Build the platform spec in several formats
 all: $(PLATFORM_SPEC).md $(PLATFORM_SPEC).pdf $(PLATFORM_SPEC).html

changelog.adoc

@@ -0,0 +1,14 @@
+// SPDX-License-Indentifer: CC-BY-4.0
+//
+// changelog.adoc: change log for the document
+//
+// Provide a list of changes made to each revision of the document.
+//
+[preface]
+## Change Log
+
+### Version 0.1-rc0
+* 2020-10-07:
+** Initial changes for structure and future maintenance.
+** Break content down into include files; more structure, but easier
+   to make changes down the line.

riscv-platform-spec.adoc

@@ -20,6 +20,9 @@ toc::[]
 // document copyright and licensing information
 include::licensing.adoc[]
 
+// changelog for the document
+include::changelog.adoc[]
+
 ## Introduction
 
 This document contains the RISC-V UNIX-class platform specification.  This