Merge pull request #3 from ls612/Ea

Natural Wonder Discovery Happiness
Merge pull request #5 from ls612/Ea

Proper Natural Wonder happiness
PlotEffect support

Some new plot methods to set, get persisted info about plot, and
associated GameEvents.
void    SetPlotEffect(effectID, effectStength)
int, int   GetPlotEffect()        --effectID, effectStength
UnitSetXYPlotEffect(iPlayer, iUnit, x, y, plotEffectID,
plotEffectStrength)
Merge branch 'Ea' of https://github.com/Pazyryk/EaDLL into Ea