Fixes small typo and cleans a couple of comments.
Merge pull request #766 from towanda/small-typo

Fixes small typo and cleans a couple of comments.
Adds a spec to check that setting a logger returns a logger.
(See https://github.com/intridea/grape/pull/760)
Removed appraised lock files.
Merge pull request #767 from dblock/appraisal-locks

Removed appraised lock files.