Shell functions for 0.6.pre4.

Found some errors: parser bugs tickled by 'wild' harness, arena test,
opy regtest, etc.

scripts/release.sh

@@ -222,6 +222,8 @@ test-opy() {

  # NOTE: This is sensitive to Python 2.7.12 vs .13 vs .14.  Ideally we would
  # remove that.

  # TODO: There is no indication if this fails!
  ./regtest.sh compile > $out/regtest-compile.txt
  ./regtest.sh verify-golden > $out/regtest-verify-golden.txt

@@ -481,6 +483,11 @@ git-changelog-0.6.pre3() {
    > _release/VERSION/changelog.html
}

git-changelog-0.6.pre4() {
  _git-changelog origin/release/0.6.pre3 release/0.6.pre4 \
    > _release/VERSION/changelog.html
}

# For announcement.html
html-redirect() {
  local url=$1
@@ -558,6 +565,10 @@ announcement-0.6.pre3() {
  write-no-announcement
}

announcement-0.6.pre4() {
  write-no-announcement
}

_link() {
  ln -s -f -v --no-target-directory "$@"
}