Headless Accelerator CLI 1.0.1

• [HA-58] Fix MGNL_HA_AUTH_TOKEN environment variable
  you can set MGNL_HA_AUTH_TOKEN with your Nexus auth user token to auto-configure, install and run the cli

Headless Accelerator 1.0.0 Release

This is the HA CLI Tool 1.0.0 Release.
Please refer to https://ha.magnolia-cms.com/docs/getting-started/hello-ha-cli