v1.0: Upgrade to 12.10-stable + Added support for Controller certificates + Better register prompts + tests + more

[NorseGaud]

Changes:

• Upgraded base to 12.10-stable
• Added retries to any (doRequest) HTTP calls to the controller to handle when the controller crashes or returns bad data + exponential backoff sleep
• Added script to generate docker tags and push them to veertu docker hub
• Added SkipTLSVerification to controller calls
• Added Controller certificate support:

  --anka-root-ca-path value             Specify the path to your Controller's Root CA certificate [$ROOT_CA_PATH]
  --anka-cert-path value                Specify the path to the GitLab Certificate (used for connecting to the Controller) (requires you also specify the key) [$CERT_PATH]
  --anka-key-path value                 Specify the path to your GitLab Certificate Key (used for connecting to the Controller) [$KEY_PATH]

• It can now run independently of other gitlab-runners on the host.
  • config.toml -> anka-config.tml
• Added --preparation-retries and defaulted it to 2
• Better registration experience with errors thrown for bad data (prompt messages, etc)
• Added a bunch of tests
• Readme update with developer guide and changes we've made from the gitlabhq repo
• Fixed all of the tests

TODO: Make tests for the executor