Changes in version 0.1.2 (2014-01-31)                  

    o   [update] Includes the LICENSE file in the package.

    o   [bugfix] Fixes tests.

                 Changes in version 0.1.1 (2013-10-04)                  

    o   [bugfix] Returns several NAs when argument is just one element (#1)

    o   [bugfix] Produces an error when all elements are empty character (#2)

    o   [bugfix] Produces an error when input is empty (#3)