Evaluate Refindit, arphahub, Pensoft and various journals

[erinspace]

Refindit - with an API! http://refindit.org/about.html

Journals - http://www.pensoft.net/journals/

Arphahub -- http://arphahub.com/about/webservices

[erinspace]

Harvesters from arphahub added in #366

Some evaluations here https://osf.io/yx2k8/wiki/Pensoft%20API/ and in the attached github repo