0.5.1 (15th March 2016) Add an x and y offset for the grid tool.
0.5.0 (14th March 2016): Add grid based anonymisation method to the
tool.
0.4.0 (5th November 2015): Add option to limit shift distance to the 95%
confidence interval.
0.3.0 (4th November 2015): Add the 95% confidence as an output of the
displacement tool, to be used (for example) as an input to a buffer operation.
0.2.0 (4th November 2015): Add the displacement lines testing tool.
0.1.0 (3rd November 2015): Initial version with independent anonymization of
points only.
