xls-dump should now dump all data in xml mode
Added handler for STYLE record.
Merge branch 'tilarids-master'
Improved parsing of formula tokens in LBL record.
Correctly parse string data for AUTOFILTER.
Read exactly 10 bytes in doper. I was reading 11 bytes for unknown type.
Handlers for WINDOW2 and PANE records.

Handler for WINDOW2 is still incomplete.
Parse shared formula records.
More handlers for pivot table records.

I'm still working on SXDtr record handler.
Handler for SXDtr is now complete.
Renamed SXField to SXFDB to reflect the spec.
Re-did parsing of SXFDB record per MS-XLS spec.
Handler for SXDBB record.

This requires storing unique values for each field item in order
to print them in the SXDBB records.
Rename: SXViewItem -> SXVI, to be consistent with the spec name.
Redid SXVI handler.
Be more specific when iCache == -1.
SXIvd -> SxIvd. Make the casing as it appears in the spec.
Explain what the pivot field index of -2 means.
Handler for SXLI.
Worked a little on dumping AreaFormat.