update release notes
add 3.4 to .travis.yml
kludge fix for _num_required_args(map)
py2/3 compat around inspect
pep8
use bool to coerce to True/False
coverage pass on sys.version_info conditionals
avoid coverage testing on isunary(map)

version dependent
add no-cover pragma around TypeError check

python 3.4 inspect on map doesn't fail
Merge pull request #157 from mrocklin/py3.4

add 3.4 to .travis.yml