2.1.0

Enhancements:

• #29: Add ability to install extensions
• #32: Add ability to write settings.json

Other changes:

• #20: Added Galaxy shield to README.md
• #21: Updated Molecule to 1.9.1
• #22: Added link to other GantSign roles
• #23: Fixed case of titles in README.md
• #24: Added pycache to .gitignore
• #25: Added license shield to README.md
• #26: Specify hosts to testinfa via python
• #27: Improved YAML quoting
• #28: Specify role in YAML style
• #31: Added test for installing extensions