Implement directional selection restores.
Implement directional selection restores.

Closes #27.

Changed Selection.placeMarkers( ) and Selection.selectMarkers( ) to
Selection.save( ) and Selection.restore( ), respectively. The old
methods are still present but as aliases.

Remove the Guardian's copyright notice; this project differs quite
a bit, so I no longer felt the need to include it.

lucthev/compose,lucthev/compose