Merge pull request #8 from NetCrafters/hotfix-invalid-links

Better handling for scraping links, i.e. relative urls and whitespace.
Merge pull request #7 from NetCrafters/feature-config-file

Extract database config to a file and share db with child.
Combine Unknown and Unsupported protocols
Merge branch 'master' of github.com:ecdeveloper/node-web-crawler
Create save_crawlers module.
Create api module.
Add environment overrides to config.
Various updates. This is a terrible commit.