* Added support for ArcticDB as the storage mechanism for pandas dataframes
2.16.0
Not secure
* [759](https://github.com/man-group/dtale/issues/759): freeze header menu option * Updated data_id storage to use strings rather than numbers * Fixed bug where calling 'cleanup' didn't cleanup instance name reference
2.15.2
Not secure
* tweaked requirements for older versions of python
2.15.1
* updates to how app's _override_routes rebuilds url_map * requirement tweaks to werkzeug
2.15.0
Not secure
* [490](https://github.com/man-group/dtale/issues/490): stratified random sample in charts * Updated sklearn column_builders to handle import failures
2.14.4
* Added dataclasses requirement for python environments >= 3.6 and < 3.7