Adapt the definition of Contribution, bring it more inline with Apache License definition.
Interesting point I missed, copyleft-next had adapted it according to its
assumption that the copyright holder is the original licensor...

Signed-off-by: Engel Nyst <engel.nyst@gmail.com>
Add Licensor definition.
I don't remove "We" yet, for no particular reason than to focus on
replacements with Licensor only in the relevant sections for exclusive
copyleft.

Signed-off-by: Engel Nyst <engel.nyst@gmail.com>
Add a phrase from Apache License, turning it into the opposite! :)

AL 2.0:
"Notwithstanding the above, nothing herein shall supersede or modify
 the terms of any separate license agreement you may have executed with
 Licensor regarding such Contributions."

How cool is this. Explicitly provide for Apache CLA.

"These terms shall supersede or modify the terms of any separate license agreement
you may have executed with Licensor regarding such Contributions."

Signed-off-by: Engel Nyst <engel.nyst@gmail.com>
Rephrase Exclusive Copyleft provision, to replace We with Licensor.

Signed-off-by: Engel Nyst <engel.nyst@gmail.com>
In PR clause, revert the term to 'We'. This can be the (c) holder...

Signed-off-by: Engel Nyst <engel.nyst@gmail.com>