Improve script runner reliability

Author: steipete

ax/ax_runner.sh

@@ -1,4 +1,6 @@
 #!/bin/bash
 # Simple wrapper script to catch signals and diagnose issues
 
-exec ./ax "$@"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &> /dev/null && pwd)"
+
+exec "$SCRIPT_DIR/ax" "$@"