[Rails-devel] MapCorrections

[Stefan F. (web.de) <ste...@we...>]

In preparation of the upcoming release I tried to improve the MapCorrection 
functionalities. In the end I mainly restrict the possible applications, 
especially downgrades to tiles that would increase the number of stations
are prevented. I was close to a possible relay of tokens, but there are too 
many tricky cases to consider. And the function should allow to solve 
potential problems, not cause new ones.

Restrictons enforced by the correction method:

1) The number of available tiles

2) A downgrade to the preprinted tile applies the original rotation 
automatically. 

3) Any up/downgrade that could cause a relay of token is prevented.

Not enforced are any connectivity rules, thus connectivity to existing track 
and not running into restricted hexes is not prevented.

The number of remaining tiles is now shown below the tile id in the upgrade 
panel display.

My last commit for the upcoming release is the game option that allows to 
activate route highlighting and revenue calculation (and will prevent any 
previously saved game from accessing those functions). This should be in 
sometime tomorrow.

Stefan