Loading BEAST files

Loading BEAST files
Created functions to print plots to pdf files

Single chains will now plot outputs to whatever pdf file is given to
the “filename” variable.  When analysing multiple chains, plots will be
sent to files named “label filename”, where label is the name given to
each chain in the labels argument.  It will also spit out a “compare
filename” file, with the between-chain pp comparisons.

In other words if you feed it “labels = c(“run1”, “run2), filename =
“output.pdf”  “, you’ll get “run1 output.pdf”, “run2 output.pdf”, and
“compare output.pdf”.