Adding release script

Author: martinthomson

release.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+set -e
+
+root=$(cd $(dirname "$0"); pwd -P)
+cd "$root"
+sub='{ s/^.*["'"'"']\([0-9]*\.[0-9]*\.[0-9]*\)["'"'"'].*$/\1/;p; }'
+old1=$(sed -n -e '/version *=/'"$sub"'' python/setup.py)
+old2=$(sed -n -e '/"version" *:/'"$sub"'' nodejs/package.json)
+
+if [ "$old1" != "$old2" ]; then
+    echo "Versions aren't the same: $old1 != $old2" 1>&2
+    exit 1
+fi
+IFS=. v=($old1)
+new="${v[0]}.${v[1]}.$((${v[2]} + 1))"
+
+sub='s/\(["'"'"']\)'"$old1"'["'"'"']/\1'"$new"'\1/'
+sed -i~ -e '/version *=/'"$sub" python/setup.py
+sed -i~ -e '/"version" *:/'"$sub" nodejs/package.json
+
+cd "$root"/python
+python setup.py sdist
+twine upload dist/http_ece-"$new".tar.gz
+
+cd "$root"/nodejs
+npm publish
+
+git commit -m "Update version to $new" python/setup.py nodejs/package.json
+git tag v"$new"