Set up RSpec with "bundle gem jobim --test"
Add support for config files with the "yml" extension ("yaml" still works)
Set the default port to 3000 (instead of 5634)

I have also updated the readme to reflect this change.
Set up simplecov for test coverage
Only check for a ".yaml" file when the appropriate ".yml" file is missing
Merge branch 'rspec'
 - Start of test suite