Additional methods are provided for modifying and defining the WorldRange of an Axis.
These are all based on expressing the new WorldMin and WorldMax as proportions of the current range, as done in the existing 'IncreaseRange' method.
This approach greatly simplifies any re-ranging done as a result of Mouse Interactions, so that more common code can be used here.
NB - CSDiff file attached is wrt svn revision 31, and also contains TicksAngle and Mono Bugfix patches as well
Axis Utilities enhancements