Merge pull request #233 from OpenTreeOfLife/add-new-study

Add new study (UI and client-side flow)
Merge pull request #234 from OpenTreeOfLife/add-new-study

Apply new study's ID to NexSON metadata.
Fix study-year test in curation tool.

This should "pass" (be silent) if either the study year or publication
string is empty.
Change creation options (ref-string, TreeBASE).

Allow study creation from a reference string (re-using the CrossRef.org
query), and disable the option to import from TreeBASE.
Fix up help text and small-screen layout.
Merge branch 'master' into add-new-study

Conflicts:
	curator/views/study/create.html