CVS log for loncom/interface/spreadsheet/lonspreadsheet.pm

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Keyword substitution: kv
Default branch: MAIN
Current tag: version_0_99_0

Added output selector and implemented excel output.

Moved $spreadsheet->display() to Spreadsheet.pm instead of having it reside
    three times in the descendents of the spreadsheet object.
Moved $spreadsheet->outsheet_excel() to Spreadsheet.pm for the same reason.
Created Spreadsheet::output_selector, which allows the user to select the
    output mode they desire.
Created $spreadsheet->excel_output_row which takes care of writing a row
    to an excel worksheet.
classcalc.pm, studentcalc.pm, and assesscalc.pm each had the same work done
on them:
  Created &excel_rows(), which writes the body of the spreadsheets to
     an excel file.
  Rewrote &get_title to return an array of title lines.
  Created &get_html_title to return an HTML version of the results of
     &get_title.

classcalc.pm and Spreadsheet.pm each have the following change:
    Created &html_header to return appropriate HTML for the spreadsheet.