fix PlosAlm PDF and HTML view counts

[hpiwowar]

The PlosAlm counter info is not displaying correctly. It should show PDF and HTML stats independently.

The correct info doesn't seem to be included in the "all" api results but likely requires an additional specific API call.

For more info and experimenting, see this page:
http://api.plos.org/alm/examples/

Especially

For article journal.pbio.0000012, return the data for all sources in XML format:
http://alm.plos.org/articles/10.1371/journal.pbio.0000012.xml?history=1&api_key=plos_api_test

and
For article journal.pbio.0000012, return PLoS usage statistics from source “counter” in XML format:
http://alm.plos.org/articles/10.1371/journal.pbio.0000012.xml?source=counter&citations=1&api_key=plos_api_test

[hpiwowar]

done