Replaced some string index values with defines.

git-svn-id: http://keeperfx.googlecode.com/svn/trunk@1452 40a56aae-0377-11df-bfb3-7781b9cb07ea
Improved computer player config files parser.

git-svn-id: http://keeperfx.googlecode.com/svn/trunk@1453 40a56aae-0377-11df-bfb3-7781b9cb07ea