Use Version module in gemspec
Add pry for development
Fix configure

Otherwise there is no init_config! on `FileConvert extend Configure
Add spec_helper to mock config
Fix configure spec
Fix typo
Mock config
Clean up syntax
Make init_config! a module method again
Mock some more
Convert specs to rspec3's expect syntax
Add some strictness for conventions' sake
Refactor gemspec
Add author, use MIT, remove non-present .yml from gemspec
Use gemspec as single source of truth for dependencies
Use colorful rspec output by default
Use more single quotes
Refactor require('spec_helper') syntax
Refactor

- There are no private module methods (unless we start to include this)
- Use fail to throw exceptions
- Use instance rather than class variable
Fix file_convert_spec