Merge pull request #158 from davebrace/master

Added file_name + '_steps.rb' as a possible alternative for feature files.
Thanks to @davebrace
Merge pull request #159 from davebrace/master

Added support to switch from a Cucumber '_steps.rb' file back to the related '.feature' file.
Update README.md

Add missing settings to README
Removed save_all from being called everything load_config is called. Instead, added a save_all command that is only called when running tests.