Elsevier: harvesting fixes

* Fixes extracting package.
* Fixes creating pdf FFT tag.
OUP: several fixes

* Converts missing old style print functions to print().
* Changes return in extract_package function.
* Changes some typos.
* Fixes unchanged missing nlst function to new ls.
Merge pull request #48 from Dziolas/marge_with_scoap_dev

Fixes for OUP and Elsevier