Revised survey data processor, responding to @rs481 comments in previous commit d55fff73:

- Direct call to perl script, instead of using preceding bash script to determine logfile, in perl directing with $logFH and $projectlogFH;
- logging and email of errors can happen before command-line options are parsed, with handleEarlyError();
- Mandatory command-line argument for config file, where required contents are checked;
- Optional arguments for emailing, uploading, downloading, verbose messaging, and running alternative date;
- alternative date is checked for consistent formatting and value;
- list of addresses to email can now be optionally provided in config file.