cf: avg.ls.cf convenience function implements averaging of LS and SL correlators in an ls object and adjusts nrStypes accordingly
matrixfit,effectivemass: use consistent colour scheme in plotting functions, take into account sign in plot.matrixfit
plot.matrixfit: add functionality to draw one-sigma error bands for the correlator fit function
weightedstuff: add routine for weighted variance following GSL implementation
Merge pull request #15 from kostrzewa/weighted.variance

weightedstuff: add routine for weighted variance
Merge pull request #14 from kostrzewa/matrixfit-addons

matrixfit and effectivemass addons
extended readbinarycf to be able to deal with several replicas in the same file
matrixfit, fit.effectivemass: Make the computation of errors on the fit parameters through bootstrapping optional, even if bootstrap samples are used to compute the inverse of the covariance matrix for the fit. This saves time if one is checking the distribution of fit results as a function of the fit range, for example
fit.effectivemass: when boot.fit=FALSE, explicitly set massfit.tsboot to NA
computefps: make bootstrapping of the decay constant computation optional
effectivemass: consistently with matrixfit, include chisqr and Qval in return value