Operations on the DOM loaded in Chrome

Changes for 0.04

• Fixed the error message when checking for correct parameters, replaced 'description' with 'name'. Added feature: user can specify javascript code to create the information hash to be returned for each matched element. Before the return was a hash of "tag" and "id". Now the user can optionally specify the javascript code to create this information hash. The fallback behaves as in previous version, there should be no breaks. POD extended. Two more module dependencies added (required for testing). All user-specified javascript code can throw exception which we will catch and propagate to perl code. This has now its own test case.