Set automatic line-ends style.

This should avoid files with mixed DOS and Unix Line ends.
Normalize line endings.

No change in the code.
Add header with author and license information.
Substitute author names in the header.
Merged headers that Pavol wrote.

Conflicts:
	pyxda/rawviewer/imagecontainer.py
	pyxda/rawviewer/loadimages.py
	pyxda/rawviewer/rawviewer.py