Change log:
* Version 0.1.3: May 2015
-Bug fix for syntactically invalid column names.
-Added a verbose parameter

* Version 0.1.2: April 2015
-Bug fix for data frames with only one character or factor.

* Version 0.1.1: November 2014
-Bug fix for single columns.

* Version 0.1.0: November 2014
-Package submitted to CRAN.

