clifro v3.2-0

Bug Fixes

• Fixed issue #14
• Updated links in Rd files to ensure no warnings when building package.
• clifro no longer tests whether or not you have Google Earth installed.

Minor Improvements

• clifro has had troubles with installation on certain operating systems due
  to the XML package (issue #19). The XML and selectr dependencies have now
  been replaced with xml2 and magrittr.
• Updated vignettes.