Any ideas on how to use Google Closure Compiler to combine multiple JavaScript files w/o any optimizations? Specifically, we want to use Closure to deploy two versions of our combined site JavaScript: release and debug. For release, we are using `--compilation_level SIMPLE_OPTIMIZATIONS --manage_closure_dependencies` which is working as intended. However, for debug, we would like our JavaScript to be combined intact/unmodified for easier debugging. It seems the minimum level of optimization is `WHITESPACE_ONLY`, any ideas would be appreciated.