Changes in Version 1.2

Addition of new functions griddify, plotFit, and plotPath.

Changed dependency to spatstat.core.

Several functions have been renamed from Version 1.1 for consistency:

findRes replaces findres
getEnvVar replaces env.var
pointInteractions replaces point.interactions
sampleQuad replaces sample.quad

calculateGCV replaces gcv.calc
calculateLikelihood replaces like.calc
calculateUnpenalisedLikelihood replaces unp.likelihood
etaFromMu replaces eta.from.mu
irlsUpdate replaces irls.update
muFromEta replaces mu.from.eta
ppmSpatstat replaces ppm.ss
scoreIntercept replaces score.int
singleLasso replaces single.lasso
standardiseX replaces standardise.X


