Merge remote-tracking branch 'alex/master'

* alex/master:
  Prepare for release of gem version 1.3.3.
  Add ip api com lookup
  Fix mime-types-data error for JRuby
  Remove OAuth util.
  Escaped pluses no longer possible without :yahoo.
  Fix "ambiguous first argument" warnings.
  Add README section about geocoding performance.
  Remove Yahoo BOSS support. The Yahoo BOSS Placefinder API is being discontinued.