v1.0.0

• The Gem now performs two types of checks:
  • Domain checks, as it did previously, now via GitHubPages::HealthCheck::Domain
  • Repository checks, e.g., the status of the last build, via GitHubPages::HealthCheck::Repository
• Even prettier pretty printer
• InvalidCNAMEError now also raises on CNAMEs pointing to pages.github.com (rather than the user's .github.io subdomain), or directly to GitHub's Fastly CNAME
• Under the hood
  • GitHubPages is now a module
  • Both new checks are incapsulated in a GitHubPages::HealthCheck::Site
  • Error classes now all end with Error and are contained within the GitHubPages::HealthCheck::Errors namespace