Changes in version 0.1.14                        

    o   Checked against R 3.6.

    o   In Lsys verbose = 0L is now completely quiet (fix by Martin Pedersen).

                 Changes in version 0.1.13 (2017-07-31)                 

    o   Checked against R 3.5 RC.

    o   Improved documentation.

                 Changes in version 0.1.6 (2015-07-16)                  

    o   Updated for R 3.3 RC. No changes were needed, so really just a check that it runs in the new environment.

                 Changes in version 0.1.4 (2015-04-16)                  

    o   Update for new version of stringr & fixed a few fiddly details.

                        Changes in version 0.1-3                        

    o   Rolled back the changes for stringr; there was a bug in the development version of stringr.

                        Changes in version 0.1-2                        

    o   Updated to work with dev version of stringr, thanks to Hadley for the heads up.

    o   3D functions removed from this version temporarily while I sort out CRAN vs Github.

                        Changes in version 0.1-1                        

    o   Added image to README.md

    o   Some work done towards 3D drawing, but it's not right.  Don't trust!

    o   Has not been built or checked.

    o   Not pushed to public repo.

                 Changes in version 0.1-0 (2014-08-12)                  

    o   First version with basic functionality.