fixed @worksheet.cols to be an array of hashes if just one hash
fixed @worksheet.cols to be an array of hashes if just one hash

ryanmark/rubyXL,weshatheleopard/rubyXL,mezza/rubyXL,weshatheleopard/rubyXL,99cm/rubyXL,99cm/rubyXL,mezza/rubyXL,99cm/rubyXL,mezza/rubyXL,ThijsWouters/rubyXL,ryanmark/rubyXL,parallel588/rubyXL,parallel588/rubyXL,parallel588/rubyXL,ThijsWouters/rubyXL,weshatheleopard/rubyXL,ryanmark/rubyXL