Added docx parsing for git, requires docx2txt in ~/Dropbox/bin

changes:
git config --global diff.docx.textconv ~/Dropbox/bin/d2t
echo -e "\n*.docx diff=docx\n" >>.git/attributes

[[ ~/Dropbox/bin/d2t¬]]
perl ~/Dropbox/bin/docx2txt.pl <$1