Add utility to figure the current crate version

ci/crate-version.sh

@@ -0,0 +1,16 @@
+#!/bin/bash -e
+#
+# Outputs the current crate version
+#
+
+cd "$(dirname "$0")"/..
+
+while read -r name equals value _; do
+  if [[ $name = version && $equals = = ]]; then
+    echo "${value//\"/}"
+    exit 0
+  fi
+done < <(cat Cargo.toml)
+
+echo Unable to locate version in Cargo.toml 1>&2
+exit 1