Add note to scipy.optimize.brute_force about the datatype of the evalution.
ENH: scipy.special information theory functions
TST: remove negative inputs
BUG: cluster.linkage array conversion to double dtype
BUG: sparse: fix operator overloading with custom types

See issue #3580.
ENH: sparse: inplace ops should fall back to x = x op y if not implemented
BUG: sparse: itruediv should be allowed on sparse matrix
Sort netcdf variables in a Python-3 compatible way

The previous implementation ran into issues with comparing different
types (tuples and bools).

Also simplified the sorting, since Python 2.3 support is no longer an
issue.
Add test for zero dimensional netCDF variables
Ensure isrec always returns a boolean
Placate irritating pep8 checker
TST: adding test cases for COO sum_duplicates
ENH: adding sum_duplicates method to COO matrix
Fix for #3596: Make fftconvolve threadsafe
adding has_canonical_format to COO matrix
fixing build errors
incorporating @jaimefrio's vectorized version
Consolidate duplicated code in fftconvolve
Fix small typo in comment
ENH: Added support for date attributes to io.arff.arffread

Requires numpy >= 1.7