v0.4.0

NEW FEATURES

• Errors from the data provider are reported now. At least we attempt to do so when they are given, for example if you specify asc or desc incorrectly with the sort parameter. See the check_response() function for examples.
• New functions facetplos() and highplos() using the solr R wrapper to the Solr indexing engine. The PLOS API just exposes the Solr endpoints, so we can use the general Solr wrapper package solr to allow more flexible Solr searching.
• New function highbrow() to visualize highlighting results in a browser.
• New function plos_fulltext() to get full text xml of PLOS articles. Helper function full_text_urls() constructs the URL's for full text xml.

BUG FIXES

• Fixed bug in tests where we forgot to give a key. No key is required per se, but PLOS encourages it so we prevent a call from happening without at least a dumby key.
• Added function check_response() to check responses from the PLOS API, deals with capturing server error messages, and checking for correct content type, etc.

IMPROVEMENTS

• Removed function crossref_r() as we are working on a package for the CrossRef API.
• Parameter arguments in searchplos(), plosauthor(), plosfigtabcaps(), plossubject(), and plostitle() were changed to match closer the Solr parameter names. terms to q. fields to fl. toquery to fq.
• Multiple values passed to fields
• returndf parameter is gone from searchplos(), plosauthor(), plosfigtabcaps(), plossubject(), and plostitle(). You can easily get raw JSON, etc. data using the solr package.
• Now using httr instead of RCurl in plosviews() function.