Tiny bumps for development dependencies rake and inch
Guard RSpec has been fixed to work with RSpec 3.0

Guard now works again :smile:
Make JSON a development dependency. Closes #118

We don't use any JSON things directly in the production code any longer,
this is all done by Faraday Middleware. It is a development dependency,
because we use it for some test helpers.
Remove an unnecessary comment from the gemspec
Merge pull request #122 from triAGENS/dependencies

Some adjustments to the dependencies