fix doi processing and correctly generate citation string literals (not hrefs)
allow non-doi uri's (e.g., jstor url's) to be saved as dc:identifer values
Merge pull request #27 from OpenTreeOfLife/doibugfix

fix doi processing and correctly generate citation string literals (not hrefs)
clean up conflicts
updating to use project defined relations instead of dc, dwc
fixed study metadata and implemented (I think) otu metadata; added root tag for nodes where appropriate