Updates to phylomorphospace3d

Yesterday I posted a new function phylomorphospace3d which uses the visualization package 'rgl' to project a tree into three dimensional morphospace (i.e., phylomorphospace). This morning I added some features to this function and posted an updated version here. Mainly these features add cosmetic improvement to the 3D plots; as well as allowing the user to control the plotting of axes, the box, and the font type. For instance, the following command was used to create the plot below in which I have simplified the axes and removed tip labels:

phylomorphospace3d(tree,X,control=list(ftype="off",simple.axes=T))