version bump
Merge branch 'master' of github.com:pytoolz/toolz
bump version to 0.5.1
move multiprocessing test to different file.

Exclude test in travis
rename multiprocessing test to avoid travis
remove travis nosetests exclusion
remove multiprocessing test
Merge pull request #124 from mrocklin/exclude-multiprocessing-test

move multiprocessing test to different file.
add reduce to toolz.curried
add side_effects function
move side_effects to sandbox
remove side_effects from itertoolz

it is now in sandbox
add side_effects to docs
Merge pull request #122 from pytoolz/side-effects

Add new `side_effects` function
Reimplement 'groupby' using 'collections.default'
Reimplement 'frequencies' using 'collections.Counter'
Reimplement 'frequencies' using 'collections.defaultdict'
Convert 'defaultdict' to 'dict'
add groupby benchmark
add frequencies benchmark