Moved "is" function to a new file called "is_functions.cpp".
Created a "is_functions.h" file for it, and made sure to call it from "labels_dendrogram.cpp"
get_branches_heights function added - overrides dendextend function dendextend:::get_branches_heights function. (it is 40-100 times faster!)
heights_per_k.dendrogram function added - gives a 10 to 130(!) faster loading times.
Bump verstion to 0.2.0
Change .h -> .hpp
Bug fix: labels.dendrogram - now returns a label also if the tree is just a leaf.
moved labels.dendrogram to a new file labels_dendrogram.r
Showing a "problem" for trees with missing labels.
RENAMED package: from RcppDend to dendextendRcpp - in order to have it easier to remember (at least for me).