RELEASE.md: Describe steps needed for a new release.

RELEASE.md

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+Steps to Finalize New Release
+=============================
+
+- Generate a diff relative to the previous version
+
+- Add any missing papers to the Publications section in
+  chap-intro.tex
+
+- Update app-versions-<version>.tex with a list of changes from
+  the diff
+
+- Review changes since the previous version to ensure the list
+  of authors is up to date in cheri-architecture.tex
+
+- Review funding acks in cheri-architecture.tex
+
+- Review acknowledgements.tex to add new projects, DARPA PMs and
+  SETAs, contractors, and students
+
+- Request a TR number
+  - Requires a tenative (but realistic) publishing date, allowing
+    for any needed review
+  - Requires updated bibiliography information (e.g. any new
+    authors
+
+- Add a new entry with the new TR number to cheri.bib
+
+- Update reference to existing version in chap-intro.tex with new
+  version and new TR.
+
+- Add a new \item in the ISA version history in app-versions.tex
+  containing an overall summary of the changes in this version,
+  the TR number, and expected publication month
+
+- Update last paragraph in abstract.tex with summary from
+  app-versions.tex
+
+- Add a new entry in cheri-version-table.tex
+
+- Update version number and set explicit \date{} in
+  cheri-architecture.tex
+
+- Tag the release as 'vX.Y'.
+
+Steps to Begin Next Version
+===========================
+
+- Update version number to "N+1 - DRAFT" and remove explicit
+  \date{} from cheri-architecture.tex
+
+- Update version number in abstract.tex and stub out the
+  last paragraph to the first sentence.
+
+- Add a stub app-versions-N+1-0.tex and add it to the end of
+  app-versions.tex.
+
+- Update the "CHERI ISA Version History" section in chap-intro.tex
+  to reference N+1.0 including the new app-versions-N+1-0.tex.