BUG: shortest_path overwrite
ENH: diagonals of coo_matrix
MAINT: setdiag edge cases and enable coo setdiag tests
TST: bump test tolerance for linalg.orth test a little.

Fixes failure observed on OS X.
TST: fix test errors in sparse tests that compare NaNs.  Closes gh-3901.

Note that only __gt__ currently raises a warning, __lt__ doesn't. This is an
inconsistency in numpy it looks like.
add dirichlet distribution to multivariate distributions
__call__ of dirichlet doesn't need an x vector
check parameters before random sample
comment dirichlet distribution
Add dirichlet distribution to docu
some minor bugfixes
dirichlet distribution tests
pep8
add dirichlet to release notes
minor. Typos and removed commented code
test on any not on all!
print correct value in error msg
empty line before ..math is needed by rst
""" to r"""
typo