created DataWriter class, to abstract from distingishuing export types throughout the code
created DataWriter class, to abstract from distingishuing export types throughout the code

git-svn-id: 375aa2af28fe8ea94d0b9c1227e895644cad4826@18 5f19bcb0-64dc-40a8-b24f-70cbb7b2b6a4

mendix/RestServices,sancgaug/RestServices,mendix/RestServices,mendix/RestServices