Drop release notes from dist package

RELEASES.rst is only updated in master branch to make it easier to make
and merge fixes to multiple branches.  Including it in the dist package
would mean that it would need to be updated in maintenance branches too
or it would be out-of-date in patch releases.

So, drop release notes from the dist package, and just link to it in the
dist README.

dist-files/README.rst

@@ -72,6 +72,10 @@ This distributable contains:
 
 * ``licenses/``: licensing information.
 
+You can find release notes at:
+
+* https://github.com/svaarala/duktape/blob/master/RELEASES.rst
+
 This distributable contains Duktape version @DUK_VERSION_FORMATTED@, created from git
 commit @GIT_COMMIT@ (@GIT_DESCRIBE@).
 

util/make_dist.sh

@@ -295,7 +295,8 @@ cat dist-files/README.rst | sed \
 	> $DIST/README.rst
 cp LICENSE.txt $DIST/LICENSE.txt  # not strict RST so keep .txt suffix
 cp AUTHORS.rst $DIST/AUTHORS.rst
-cp RELEASES.rst $DIST/RELEASES.rst
+# RELEASES.rst is only updated in master.  It's not included in the dist to
+# make maintenance fixes easier to make.
 
 for i in \
 	murmurhash2.txt \