pycadf 2.7.0 release

meta:version: 2.7.0
meta:diff-start: -
meta:series: queens
meta:release-type: release
meta:pypi: yes
meta:first: yes
meta:release:Author: Lance Bragstad <lbragstad@gmail.com>
meta:release:Commit: Lance Bragstad <lbragstad@gmail.com>
meta:release:Change-Id: Iac4eab1ca4cd4d5bd30f07fb42618d2082cf41ed
meta:release:Code-Review+1: gordon chung <gord@live.ca>
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Workflow+1: Sean McGinnis <sean.mcginnis@gmail.com>
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