v0.0.8: Bumping version number to 8.

Added Delayed Job checker.

v0.0.7: Changing config initialization to construct checker names directly fr…

…om the class, rather than instantiate and interrogate.

Bumping version to 0.0.7

v0.0.6: Added AWS S3 checker.

Bumping version to 0.0.6

v0.0.5

Added Stripe checker.  Bumping version to 0.0.5.

v0.0.4

Updating Gemfile to reference spec_cat by tag rather than gem version