Generates Array Of Successfully Deletions + More

The script now creates and array available at $Connection->Deletions
containing successes. It also has added retry attempts if Magento return
false on deletion of a product.
Added HTTP Authentication

Added ability to connect using HTTP authentication is SOAP API URL is
protected.
Add Logging To File

Added logging to txt file if enabled true in the settings. Script can
take a VERY long time to execute as send request for each individual
Product then Image. Viewing log file can see incremental progress whilst
nothing is printed to the browser.