docs: Add changelog to documentation

In order to allow Sphinx to process the changelog, change the underline
characters used by Towncrier to match the format used by the rest of our
documentation (otherwise, Sphinx tries to make one table of contents
entry for each version).  Add a symlink to `NEWS.rst` as
`docs/changelog.rst`, and indent the body of the ReST comment at the top
of the file.

Signed-off-by: Matt Wozniski <mwozniski@bloomberg.net>

NEWS.rst

@@ -1,33 +1,36 @@
 .. note
-You should *NOT* add new change log entries to this file, this
-file is managed by towncrier. You *may* edit previous change logs to
-fix problems like typo corrections or such.
+    You should *NOT* add new change log entries to this file, this
+    file is managed by towncrier. You *may* edit previous change logs to
+    fix problems like typo corrections or such.
+
+Changelog
+=========
 
 .. towncrier release notes start
 
 memray 1.0.3 (2022-04-21)
-=========================
+-------------------------
 
 Features
---------
+~~~~~~~~
 
-- Add `memray` as a command line entry point. (#20)
+- Add ``memray`` as a command line entry point. (#20)
 
 memray 1.0.2 (2022-04-12)
-=========================
+-------------------------
 
 Features
---------
+~~~~~~~~
 
 - Add publishing of ManyLinux2010 wheels for 64 and 32 bit systems. (#2)
 
 Bug Fixes
----------
+~~~~~~~~~
 
 - Fix 32 bit builds. (#2)
 
 
 memray 1.0.0 (2022-04-09)
-=====================================
+-------------------------
 
 -  Initial release.

docs/changelog.rst

@@ -0,0 +1 @@
+../NEWS.rst

docs/index.rst

@@ -50,3 +50,9 @@ Memray can help with the following problems:
    table
    tree
    stats
+
+.. toctree::
+   :hidden:
+   :caption: Project Information
+
+   changelog

pyproject.toml

@@ -30,6 +30,7 @@ type = [
   { name = "Improved Documentation",    directory = "doc",     showcontent = true },
   { name = "Miscellaneous",             directory = "misc",    showcontent = true },
 ]
+underlines = "-~"
 
 [tool.pytest.ini_options]
 markers = [