Added
* Support for CloudTrail `lookup_events` API that allows users to generate a policy without downloading logs from an S3 bucket.
Note that this API only returns _["create, modify, and delete API calls"](https://docs.aws.amazon.com/awscloudtrail/latest/userguide/view-cloudtrail-events-supported-services.html)_
* `trailscraper download` now supports `--from` and `--to` flags to specify the timeframe that should be downloaded. Accepts precise (e.g. "2017-10-12") and relative (e.g. "-2days") arguments.
* `trailscraper generate-policy` now supports `--from` and `--to` to filter events to consider for the generated policy. Accepts precise (e.g. "2017-10-12") and relative (e.g. "-2days") arguments.
* Performance optimizations: `generate-policy` only reads logfiles for the timeframe requested
* Added `--version` command line argument
Changed
* Set more flexible dependencies
Removed
* Removed `--past-days` parameter in `trailscraper download`. Was replaced by `--from` and `--to` (see above)
Fixed
* Ignore record files that can't be read (e.g. not valid GZIP)