add index to publisher_options to avoid duplicates
handle publisher-specific options in crossref source
handle publisher-specific options in pmc source
updated link to source code in documentation for sources
removed doi_prefix from settings.yml
completed wiring for publisher_options
updated Gemfile.lock
fixed tests for changes with publisher_options
ALM-735 upgraded to Rails 3.2.19
allow star and admin users to link to publisher
Merge pull request #114 from mfenner/master

Allow publisher-specific source settings