Renamed Fighter to Bulwark, to make it very clear to new players that the...

Renamed Fighter to Bulwark, to make it very clear to new players that the fighter is not the "classic" dumb "bump until it dies" class (which really does not exist in ToME)


git-svn-id: http://svn.net-core.org/repos/t-engine4@4478 51575b47-30f0-44d4-a5cc-537603b46e54