Create all empty models that are going to be used
Basic objects created

resolves #1
Fix error
1. Add comments for attributes
2. Add id attributes in basic objects for database entry identification
1. Preparing objects for DAO structure
2. Limit possible DS algorithms values

See #1 and #2
1. DAO to persist domain object and dependencies (nameservers and ds sets)
2. Begin with domain DAO tests

See #2
Explicit say that constant values are a DS algorithm value
Domain DAO search method

See #2
1. Add more tests
2. Add method to remove the domain from the database

See #2
Keep attibute name consistency with Nameserver object

See #1
Using a compare function for domain objects

See #2
Add function to connect to the MongoDB database
See #2
1. Domain DAO tests now are OK
2. Configuration file for integration test

Resolves #2
Instructions for project dependencies
Merge branch 'master' of https://github.com/rafaeljusto/shelter

Conflicts:
	README.md