chiplot 0.1.0

• First version. Functions chiplot(), chivals(), chipairs(), chimult(), chipart(), chidepth() and chi.partitions(), with plot() and print() methods.
• Compiled code is in C: the bivariate chi-values (from the Fortran subroutine in chisub.f) and the multivariate chi-values (from Hval.cpp, using a bit-set algorithm that gives identical values much faster).
• Data depths are computed in base R; "RP", "TD" and "MhD" reproduce fda.usc::mdepth.RP, mdepth.TD and mdepth.MhD. With the same seed, chimult() reproduces the original chimult.lam() exactly.