Add support for disabling ANSI colour output via the --no-color flag
or the NO_COLOR environment variable. The suggested implementation was
inspired by the standards defined at no-color.org
Add Enbas code. So far Enbas can:
- Allow the user to register the application and log into GTS on their
behalf. The scope is limited to read for now.
- Show instance details.
- Show local and remote accounts.