Remove unused method
Update dependencies: cane, flay, flog, reek
Update to revived roodi
Skip tests that crash rubinius

See
https://github.com/rubinius/rubinius/issues/2567#issuecomment-23364252

This has to do with mocking File.open here, which is also used in
Rubinius for storing a cached compiled file.

This is the exception that caused the compile error:

  expected: ("tmp/metric_fu/scratch/rcovgenerator/rcov.txt")
       got: ("/Users/dirkjan/.rbx/b8/b801302b955f897f99641035f2f20e879e3af8cf", "wb")>
/Users/dirkjan/Code/rubinius/gems/gems/rspec-mocks-2.14.3/lib/rspec/mocks/error_generator.rb:144:in `__raise'
/Users/dirkjan/Code/rubinius/gems/gems/rspec-mocks-2.14.3/lib/rspec/mocks/error_generator.rb:27:in `raise_unexpected_message_args_error'
/Users/dirkjan/Code/rubinius/gems/gems/rspec-mocks-2.14.3/lib/rspec/mocks/proxy.rb:165:in `raise_unexpected_message_args_error'
/Users/dirkjan/Code/rubinius/gems/gems/rspec-mocks-2.14.3/lib/rspec/mocks/proxy.rb:147:in `message_received'
/Users/dirkjan/Code/rubinius/gems/gems/rspec-mocks-2.14.3/lib/rspec/mocks/method_double.rb:174:in `open'
/Users/dirkjan/Code/rubinius/runtime/compiler/compiled_file.rbc:42:in `dump'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:92:in `run'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:53:in `run_next'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:115:in `run'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:53:in `run_next'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:132:in `run'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:53:in `run_next'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:155:in `run'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:53:in `run_next'
/Users/dirkjan/Code/rubinius/runtime/compiler/stages.rbc:210:in `run'
/Users/dirkjan/Code/rubinius/runtime/compiler/compiler.rbc:377:in `run'
/Users/dirkjan/Code/rubinius/runtime/compiler/compiler.rbc:93:in `compile'
kernel/delta/codeloader.rb:174:in `compile_file'
kernel/delta/codeloader.rb:148:in `load_file'
kernel/common/codeloader.rb:130:in `require'
kernel/common/codeloader.rb:226:in `require'
kernel/common/autoload.rb:54:in `resolve'
/Users/dirkjan/Code/rubinius/gems/gems/rspec-expectations-2.14.2/lib/rspec/matchers.rb:486:in `include'
/Users/dirkjan/Code/metric_fu/spec/metric_fu/metrics/rcov/rcov_spec.rb:53:in `__script__'
Merge pull request #130 from metricfu/update_dependencies

Update dependencies: cane, flay, flog, reek, metric_fu-roodi -> roodi