Addition of four datasets to test the different functions.
Verification that graphical setting are restored upon exit of the
functions.
The statements T/F were changed to TRUE/FALSE in all the
functions.
The examples of the functions write data on tempdir().
To compile with the CRAN policies, we explicitly ask the user
whether a file (csv or pdf) should be created on the working directory
when a given function is called.
metaprotr 1.2.1
Addition of NEWS.md file to track changes to the
package.