Required files
spec/runner/formatter
spec/runner/context
spec/runner/context_eval
spec/runner/specification
spec/runner/execution_context
spec/runner/context_runner
spec/runner/option_parser
spec/runner/command_line
spec/runner/drb_command_line
spec/runner/backtrace_tweaker
spec/runner/reporter
spec/runner/spec_matcher
spec/runner/extensions/kernel
spec/runner/spec_should_raise_handler
spec/runner/spec_parser