Added
* add check-consistent-dev-env-version.sh to CircleCI pipeline
* add run-bandit.sh to CircleCI pipeline
* add .cut-release-version.sh in support of using new revs of [dev-env](https://github.com/simonsdave/dev-env)
Changed
* renamed run_sample.sh -> run-sample.sh
* the ttlInSeconds property in spider metadata is now ttl and the value associated
with the property is now a string instead of an integer - the string
has the form <number><duration>
where <number> is a non-zero integer and <duration> is one
of s, m, h or d representing seconds, minutes, hours
and days respectively
* the maxCrawlTimeInSeconds spider metadata property is now maxCrawlTime
and is also a string instead of an integer - the string
has the form <number><duration>
where <number> is a non-zero integer and <duration> is one
of s or m representing seconds and minutes respectively
* dev-env 0.5.15 -> 0.5.19
* sha1 -> sha256 after running [bandit](https://github.com/PyCQA/bandit)
Removed
* Nothing