[Rails-devel] Settong Erie home base during green upgrade

[Erik V. <eri...@hc...>]

I have (finally) done the main remaining unimplemented 1830 feature:
selecting the Erie home base while upgrading to green. To trigger the
selection I could have written code to detect the need for it, but for now I
have chosen to add a special attribute in TileSet.xml for the preprinted
(while/yellow) tile -20. During the upgrade, the same request will pop up as
already occurs when laying a token on a multi-station tile.

This new feature requires some extra non-transient attributes of LayTile.
Normally such an extension makes existing saved files unreadable, as these
contain serialized versions of LayTile objects. This time I have tried to
achieve backwards compatibility by writing special deserialization code in
this class. It seems to work nicely.

(Although Erie did not appear in the bug list, I tend to consider it as
such, if only for justifying submitting this change during the new features
freeze we now have...).

Erik