Weather Display to Cumulus log file Converter

This application takes a Weather Display mmyyyylg.txt file and produces a Cumulus
'monthly' log file from it. It will optionally convert all the other ...lg.txt files 
in the same folder as the selected file.

If the parallel 'indoor' and/or 'vantage' logs exist for the selected lg.txt file,
it will also process those.

Not all of the Cumulus fields can be generated as the data doesn't exist in the WD file.

It creates log files in the 'Converted' folder using the file names which
Cumulus expects. If you run it more than once for the same log file, it
will first delete the existing converted file. Copy the generated file(s) to
the Cumulus data folder.

Once you have created the monthly log files, you can use the dayfile.txt editor in
Cumulus to create the entries in dayfile.txt (using 'create missing').

Note that neither the converter nor Cumulus can handle data from before January 2000.

There are likely to be bugs; please check the results carefully, and report any problems
in the Cumulus support forum at http://sandaysoft.com/forum

This program is in the public domain; you may do whatever you wish with it. You use the
program at your own risk. As always, take backups!

Steve Loft/Sandaysoft February 2014