Citeproc/CSL support

[kosarko]

started from #515. watch the mentioned dspace issues...

not mentioned issues (other than accents escaping) with citeproc-java:

• a wrapper around citeproc-js which apparently has license incompatible with dspace
• the released version (0.6) is broken with java8 (due to changed default js interpreter in java8). Seems this was fixed but not released later on.

[kosarko]

https://www.atmire.com/articles/detail/university-of-bordeaux-releases-citation-styles-for-dspace?utm_source=generallist&utm_medium=email&utm_campaign=cslpatch

[stranak]

Is the situatiuon still unchanged and Citeproc-Java is still broken?

In case this issue is better postponed to new UI, depending on what UI it is, maybe the implementation in Invenio / Zenodo would be relevant. I think this is the most common approach and I like it: include all the hundreds of CSL styles, pick one default and add a search box to change the citation style. Also allow export of the CSL itself. This is how they implemented it https://github.com/inveniosoftware/invenio/issues/1416

[stranak]

look at https://opencitations.net how it relates

[kosarko]

maybe related to #1115