default line ending attributes

Trying to fix the multiplying linefeeds in setup.py, step 1.
(https://help.github.com/articles/dealing-with-line-endings/)
line ending fix, step 2.

If git suddenly wants to commit all your files (it shouldn't), then
follow instructions here:
https://help.github.com/articles/dealing-with-line-endings/#refreshing-a-repository-after-changing-line-endings
line ending fix, step 3 (remove extra line feeds).