[Lazarus] New Spreadsheet interface component available for Excel and OO Calc

[Thierry Coq]

Please find an upgrade of the ExcelInterface component, now called 
SpreadsheetInterface, here:
http://www.tcoq.org/composants

It allows programs to connect to Excel using the OLE interface, and 
connect to the Open Office Calc using the UNO bridge, using the same 
interface. The OLE and UNO details are hidden using interfaces. The Open 
Office Calc interface is very preliminary, but demonstrates basic cell 
editing: values, strings and formulas. It has been tested under Windows 
for the time being, and with Lazarus 0.9.29 and FPC 2.5.1.
The design and user manual is very limited, so please look at the test 
suite for examples on how to use.
All comments and suggestions are welcome.
Thanks to the Pas Uno Bridge team, for their huge work!
Enjoy,
Thierry