ANNOUNCE: xlrd 0.5.2 -- extract data from Excel spreadsheets

[jcmendez]

Hi John

I'd like to create a dependency graph and plot it with Graphviz.  I've
played a bit with exporting the sheet in XML format, and parsing the
XML.  That somehow works, but it would be much better if the users
wouldn't need to save as the sheets, just put them is a shared
directory where I can get them with the script.

Thanks!!