Study on using CrossRef services.
Citeproc example.
Hacked citeproc.js to generate semantic tags for fields.
Study for customizing citeproc.js
Merge branch 'citation-plugin' of https://github.com/substance/visual-editor into citation-plugin

Conflicts:
	studies/citeproc/citeproc.js
	studies/citeproc/index.html
	studies/citeproc/loadcsl.js