Notify about skipped test, when no Excel support is available
Support openpyxl

As xlwt generated spreadsheets crash my latest Excel 2013, I hacked a
quick support for openpyxl, which, to my deepest suprise, works. I had
to modify test case to support it and I also hacked the
get_excel_support function to be able to dynamically (during runtime)
get Excel support settings (module-level defined constants make testing
harder). I'd love to hear your feedback on this patch, if it is good,
please feel free to include it in the main branch.
Bump version number
This is required to stop MS Excel warning

... about improper extension for that format.
Much better now...
Column widths & bold, YAY COOL!

Thank you for a great project, mr Pablo!
Merged upstream
Fix after merging
The test project. Login into admin as test/test
Updated docs
Merge pull request #10 from mpasternak/master

That's some cool stuff i hacked recently, see the commit description, pls.