Added mk_rel.bash to help.. mk rels.

mk_rel.bash

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+set -e
+
+USAGE="usage: ${0##*/} <tag>"
+
+tag="${1}"
+
+[ ${#} -lt 1 ] && {
+    echo ${USAGE} >&2
+    exit 2
+}
+
+# does the specified tag exist?
+if ! git tag | grep "${tag}"; then
+  echo "Make sure you've tagged '${tag}'"
+  exit 3
+fi
+
+# grab that tag
+git co "${tag}"
+
+# clean up if we need to
+[ -f Makefile ] && make distclean
+
+./autogen.sh
+
+./configure
+
+make dist
+
+git co master