Mixed line endings in the repo

[karfau]

There are 18 files that contain CRLF line endings/ line separators/ line breaks in them:

I found this out the hard way by having huge diffs in #51 .

To detect them I downloaded the zip archive of the repo (to circum went changes git does when checking out code), opened the unzipped folder in my IDE and ran the related inspection "Inconsistent line separators" on the whole folder structure:

test/3rd-cases/o3xml.js
test/parse/namespace.js
test/parse/node.js
test/parse/big-file-performance.js
test/parse/simple.js
test/parse/parse-element.js
test/parse/locator.js
test/error/xml-error.js
test/error/error.js
test/html/normalize.js
test/dom/attr.js
test/dom/element.js
test/dom/level3.js
test/dom/clone.js
test/dom/index.js
test/test.js
test/index.js
__package__.js

Ideally even when people from different OSes contribute the repo should only contain LF line endings,
for the git config option core.autocrlf to work properly.

This can be enforced by adding a .gitattributes and/or .editorconfig file into the repo.