Altmetric.com twitter integration for articles

this commit doesn't support getting provenance urls for non-article dois.
fix plos icon
send non-article dois and arxiv ids through altmetric for aliases

makes sniffer code uglier.  fix ti soon with proper queues?
remove stray prints
fix code that allows refresh of a collection
updates from altmetric.com
fix json call
fix string casting
call json method again
other altmetric_com metric sources too
Merge branch 'master' into twitter
updater unnesting
more prints
more prints
handle no data
update everything with an altmetric id
remove return
quick hack to run just altmetric stuff through
fix typo
fix indent.

hrm, tired.