fix date in changelog

bump version, update changelog

tweaks to docs

remove travis build

remove py3.4 from setup.py list

Merge pull request #85 from ariebovenberg/drop-34

drop python 3.4 support

Merge pull request #36 from ariebovenberg/release-1.3.4

release 1.3.4

Merge pull request #34 from ariebovenberg/release-1.3.3

release 1.3.3: fix urllib error handling

Merge pull request #32 from ariebovenberg/docs-improvements

release 1.3.2: improvements to docs

Merge pull request #31 from ariebovenberg/py37-support

release 1.3.1: official python 3.7 support