Git attributes for .docx diffing
docx2txt
Download and install the docx2txt converter from http://docx2txt.sourceforge.net/
wget -O doc2txt.tar.gz http://docx2txt.cvs.sourceforge.net/viewvc/docx2txt/?view=tar
tar zxf docx2txt.tar.gz
cd docx2txt/docx2txt/
sudo make