typo fix
Add Newick_gtree.expand_multifurcation_to_bifurcation.
Adding Convex.find_b_assignments.
Fixing EnumFuns.combinations's behavior when n < r.

Previously, this would cause an error. Now, it returns an empty enum.
Adding a partial implementation of multifurcating convexify.

Strict convexity is, at the moment, not supported. That's the next (and
hopefully last) thing to implement before this is done.
Major cleanups and comment revisions in convex.

Some cruft in find_b_assignments and _build_apartl wasn't actually necessary
with the new implementation. This removes that cruft.
Finish strict convexity; add more tests.
Document strict convexity more.
Adding `guppy placemat`.
Fixing accidental whitespace change.
NBC comments
a couple more comment notes
Fixing seeded NBC support.
Correcting the capitalization of oUnit.
Correct list of classifier options
Initial work on qPD(T) in `guppy fpd`

calculate rooted & unrooted
Merge branch '291-chao-qdt' into dev

Closes #291
OPAM for dependency management

* Update docs
* Add list of requirements
Use gh-pages branch of pplacer-opam-repository

Negates git requirement; downloads packages directly from
GitHub, which should prevent broken hyperlinks.
Remove old install script