ODIN change log

24/04/2006:
NodeArray.java: corrected non-ternary c2 to remain proportional to initial bulk value.
NodeArray.java: corrected c2 to be updated by updateNodes() for both cases.
All NodeArray.java subclasses: now remember initial values.

09/06/2006:
CustomGrid.java: extended class in line with others for use with new GUI.
Odin.java: custom grid settings reactivated. Load grid from anywhere fixed.

21/08/2006:
NodeArray.java: node getter methods now check for empty arrays before returning.

31/08/2006:
NodeArray.java: fixed ternary boundary condition so that oscillations no longer occur;
  second solute needs to use the *new* corresponding value of oxidising solute at interface.
NodeArray.java: added xNodes and yNodes getter methods.
All NodeArray.java subclasses: changed stability criterion for ternary case - extra dc/dx
  term behaves as an extra dimension.

06/09/2006:
Odin.java: added POV-Ray mesh output; output commented out for .jar version.

