(svn r4584) CodeChange : Cleanup of industry_cmd (Step-3).
Renaming GetIndustrySpecification to GetIndustrySpec. Looks better.
Removing the _industry_prod_up/down/close_strings
in favor of IndustrySpec.closure/production_up/down_text;
A few reformatting along the way.
Work of tfc_team

/* $Id */

KNOWN BUGS / PROBLEMS:

Normal and elrail depots look the same. Use 'X' (transparent buildings)
   to distinguish between them
Missing curors / icons for construction (currently using the conventional ones)