I needed to be able to use a different set of arguments. Updated to allow
for the args to be passed in the same way the src and dest are. Could
improve by comparing the two arrays instead of simply overriding them.
Now generated PDFs are placed at the destination specified in the
end-users's Gruntfile, rather than appending the source file's path to
the destination path. The created PDFs have the same name as the source
HTML file, excep the file extension is changed to .pdf.
