This plug-in fills all the selected parts of an image from the outside in with 2 colours
or 1 colour and a transparent band. The filled selection will be placed on a transparent
layer above the active layer.
The number of bands is user defined in the number of iterations, if however the
selections is totally filled, the process will stop before the number of iterations
being given is reached.
To totally fill a selection, choose a very high number of iterations.
The width of each band can be increased or decreased by a given amount of pixels in
every iteration. It is also possible to feather one or both colours.
Tested on Windows Vista and Ubuntu 12.04.