Merge pull request #405 from andersk/shell

run: Fix shell scripting bugs

Author: samhed

run

@@ -1,7 +1,4 @@
 #!/usr/bin/env sh
-
-BASE_DIR="$(cd $(dirname "$0"); pwd)"
-
-cd "$BASE_DIR"
-
-python -m websockify $@
+set -e
+cd "$(dirname "$0")"
+exec python -m websockify "$@"