merging in develop

Author: isaisabel

CHANGELOG.md

@@ -1,3 +1,12 @@
+# v1.9.1 - 9 April 2021
+With the release of our [mitreattack-python](https://github.com/mitre-attack/mitreattack-python) pip module, we're removing the tools previously found in the `layers` folder as they are now part of that module.
+
+## Improvements
+- Updated documentation to highlight the new [mitreattack-python](https://github.com/mitre-attack/mitreattack-python) pip module.
+- Removed the scripts in the `layers` folder which are now part of [mitreattack-python](https://github.com/mitre-attack/mitreattack-python).
+- Cleaned up `requirements.txt` to remove modules that are no longer required.
+
+
 # v1.9.0 - 23 March 2021
 ## Improvements
 - [diff_stix.py](scripts/diff_stix.py) now supports an `--unchanged` argument which adds a section listing objects which did _not_ change between releases.

README.md

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 # attack-scripts
 
-This repository contains various tools and utilities for working with ATT&CK content.
+This repository contains standalone scripts and utilities for working with ATT&CK.
 - the [scripts](scripts) folder contains one-off scripts for processing and visualizing ATT&CK content.
 - the [scripts/layers/samples](scripts/layers/samples) folder contains one-off scripts demonstrating the generation of ATT&CK Navigator layers from ATT&CK data. The outputs of these scripts can also be found on the [ATT&CK Navigator repository](https://github.com/mitre-attack/attack-navigator/tree/master/layers/data/samples).
-- the [layers](layers) folder contains a collection of modules and scripts for working with [ATT&CK Navigator](https://github.com/mitre-attack/attack-navigator) layers.
+
+See also our [mitreattack-python](https://github.com/mitre-attack/mitreattack-python/) pip module for more python tools!
 
 ## Requirements
 - [python3](https://www.python.org/)