* script renamed to match the built-in version closer;
* GUI definition moved to an external file 'dialog.json';
* minor clean-up in the organisation of the script
* original functionality restored
* Documentation updated.
* Added selection of destination folder.
* Implemented generic layer traversal.
* added ignore filter for testing files
* comments improved
* layer count fixed
* Implemented export of visible layers.
* Re-implemented export of all layers.
* Speed tests performed, results recorded.
* Added in-code profiling capabilities (ExtendScript Toolkit for CS2 is unreliable).
* Further speed-up of exporting process achieved; export algorithms merged. (Indexing layers through API is very slow.)