Describe a more robust way to test prior to making a new release
Describe a more robust way to test prior to making a new release

Adds instructions to create a local conda environment that most closely matches
the Travis CI environment and run tests prior to making and pushing a new
release. This approach is more likely to catch errors caused by changes to
external dependencies that may not be reflected by your local Nextstrain
development environment.

nextstrain/augur,nextstrain/augur,blab/nextstrain-augur,nextstrain/augur