Rough draft OA, added files

A rough draft is made of the Open Access part of the introduction.
Reference files are only included if they are not directly citable. Tool
list is under construction. Please note that the .bib file is not yet
located in the repo, but will be in the end due to Mendeley
auto-bib-building to a different folder than the repo.
Added CC-BY license, writing.

CC-BY license included from
http://creativecommons.org/licenses/by/3.0/legalcode
Also did some writing