Add namecheap as domain provider

[gkpty]

when the godaddy provider is provided open the following link in the browser:
https://ap.www.namecheap.com/settings/tools/apiaccess/

then print in the console:
Sign in to namecheap in the browser window and complete the following steps:

1. click on the switch in the right hand side to enable API access.
2. enter your password to confirm
3. whitelist your public IP address - ${IP_ADDRESS}
   Copy your API key into ~/.torus/config in the following format:
   [namecheap]
   namecheap_api_key=YOUR_API_KEY