spocc v0.7.0

NEW FEATURES

• Removed javascript and V8 package import and using
  wicket C++ based package instead. So you no longer need V8
  which should make installation easier on some platforms. (#172)

MINOR IMPROVEMENTS

• httr replaced with crul for HTTP reqeusts (#174)
• Moved to using markdown for docs. The only thing you should
  notice that's different now is doing curl options is slightly
  different - it's just curl::curl_options() (#176)
• All as.*() functions can now pass on curl options to the
  http client (#177)
• Bumped minimum versions for a number of dependencies

BUG FIXES

• Fix to foo_ala() - the internal plugin for occ() that
  handles ALA queries: changed query from full text query using
  q=foo bar to q=taxon_name="foo bar" - in addition, improved
  error handling as sometimes occurrences slot is returned in
  results but is empty, whereas before it seemd to always be
  absent if no results (#178)