cutree.dendrogram.r - added first version of the file (with the old functions which will now be revised to newer naming conventions and documentation)
is.natural.number function added (with tests and documentation)
Changed functions names to be more S3 like.
cutree_1h.dendrogram function added (with doc and tests) - like cutree, but only for 1 height
hang.dendrogram function added, including tests and doc.

Also added some docs to other functions.
vignettes - expended the abstract a bit.

Also added some .bib (not added to the vignettes yet)
nnodes function added - count the number of nodes in a tree

Also: added nleaves.phylo methods, based on as.hclust so it could be improved in the future.

And - as.dendrogram.phylo
get_nodes_attr function added

Also moved get_branches_heights to attr_access.r
fix .bib (commas were missing)
bumping version to 0.4 (we'll stay here for a while...)
fix_members_attr.dendrogram function added.
hang.dendrogram - added a test, and source ref for the function
test when get_nodes_attr doesn't get an attribute
vignettes - added some attr extraction examples.
Fix a major bug in cutree_1h.dendrogram due to some line getting erased at some point (not clear when that bug was introduced).

Also added tests (and some code in the example) for heights_per_k.dendrogram
Make cutree_1h.dendrogram identical to cutree when height is above ALL clusters

Changing 1 -> 1L
Moving hang.dendrogram from cutree.dendrogram.r to attr_access.r

Also moved the relevant tests.
cutree_1k.dendrogram function added.

Also some changes to the doc of
cutree_1h.dendrogram was made,
As well as changing boolean->logical in some docs.
dendrogram_heights_per_k -> dend_heights_per_k
cutree_1k.dendrogram - added tests

(as well as faster solution for trivial cases of k)