#407 introduction of a player XP adjustment

[Baruk Khazad!]

Proposal: Replace the Regular Commander status with a short term XP multiplier
Proposed changes:

• Remove the Regular Commander status.
• For the first 1500 xps, adjust the % land that this player can win or lose based directly on those xps. In java it would be, "min((500 + PlayerXp) / 2000, 1)".
  ------ This formula would apply as a multiplier to the current ELO adjusted land % for each player (so playerA multiplier * playerB multiplier * land% = final land %).

Examples of the effect:

• Two players, one with 100 xp and the other with 100 xp.
  ----- The land exchange is 9% of the ELO adjusted land %.
• Two players, one with 2000 xp and the other with 100 xp.
  ----- The land exchange is 30% of the ELO adjusted land %.
• Two players, one with 2000 xp and the other with 1000 xp.
  ----- The land exchange is 75% of the ELO adjusted land %.
• Two players, one with 2000 xp and the other with 2000 xp.
  ----- The land exchange is 100% of the ELO adjusted land %.

Expectations:

• Noob hunting would be mitigated by the noob's low xps.
• Anyone can be a conquer target.

[Steve Gore]

The values used should be settable in configs as different servers use different XP scales.