Manage spreadsheet cells date and numeric types as well as a couple of
exceptions.
Renamed API rawdoc and related getFile method to spreadsheet /
getSpreadsheet to reflect the current implementation goal.
Debug logs clean up.
Added insertWorkBookUserDetails, definePrintRange,
evaluateAllFormulaCells.
Spreadsheet creation now benefits from insertWorkBookUserDetails,
insertWorkBookPageNumbers and evaluateAllFormulaCells processing.
In addition mergeHtmlResults also deals with print range.