ODF document example to apply Peter's style name approach

[Franz de Copenhague]

I have added my first example with below comments in README.txt

DupStyleName.odt
    Contains a paragraph and character style with the same name, DupStyleName.
    Contains span tag inside other span tag.


I have realized that there is a little inconsistency between the standards name 
OOXML and ODF and the folder example names.

sample/documents/odf/DupStyleName.odt sounds good
sample/documents/docx/Whatever.docx could be like 
sample/documents/ooxml/Whatever.docx

franz