Add CanonFiredAvgDamge/explDamage to score board

[lsh010815]

Is your feature request related to a problem? Please describe.
The CanonFiredAvgDamge will be totally different for different classes if we add different explDamage in classes system, But CanonFiredAvgDamge/explDamage can still give us a clear feedback for how accurate the robots shoot.

Describe the solution you'd like
Something like this:

              Name      Points     %    Count   AvgHealth    Count   AvgDamage   CFAD/ED  TotDamage  IP:Port
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     Tirpitz v13 l         255  30.8       19       46.62     1375        3.15   someNum  4334.48   127.0.0.1:20003
   Tirpitz v13 ler         207  25.0       13       28.26     2633        0.79   someNum  2074.13   127.0.0.1:20005
     Tirpitz v13 l         187  22.6        9       32.22     1332        2.98   someNum  3964.69   127.0.0.1:20004
     Tirpitz v13 l         179  21.6        8       28.97     1305        2.81   someNum  3663.47   127.0.0.1:20002
 ------------------------------------------------------------------------------------------------------------------

Describe alternatives you've considered
Also need to do something for totalDamage.

[dbakewel]

OK, good idea. Let's wait on this until we see how the new classes look. I'm concerned about how big the scoreboard is getting.