Fix #77 - Initialized gcloud dns.

Cleaned up dns.

Addressed comments on dns.

Added function to create changes.

Changed project_id to project and addressed comments.

Made some changes.

Streamlined dns to reflect first draft of design and updated doc strings.

Initialized more doc strings.

Edited some doc strings.

Changed project_name to project.

Updated docstrings and fixed some errors.

Fixed a bug involving changes.