updated documentation and removed layerlib to reflect migration to mitreattack-python

Author: isaisabel

README.md

@@ -1,9 +1,10 @@
 # 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/)