add extensions to .gitattributes for line ending handling for .def, .gitattributes, .gitignore.  Fix for .jpeg
add extensions to .gitattributes for line ending handling for .def, .gitattributes, .gitignore.  Fix for .jpeg

modulexcite/Open-XML-SDK,KuPai32G/Open-XML-SDK,mimisasouvanh/Open-XML-SDK,KuPai32G/Open-XML-SDK,OfficeDev/Open-XML-SDK,JesseQin/Open-XML-SDK,modulexcite/Open-XML-SDK,ThomasBarnekow/Open-XML-SDK,syediddi/Open-XML-SDK,EricWhiteDev/Open-XML-SDK,EricWhiteDev/Open-XML-SDK,syediddi/Open-XML-SDK,ClareMSYanGit/Open-XML-SDK,tarunchopra/Open-XML-SDK,tomjebo/Open-XML-SDK