Add indexes suggestions function
- Change EvaluationResult class into parent class of EfficencyResult and IndexResult
- Complete chek_for_indexes method
Merge pull request #32 from macworld/add_suggestion

Add indexes suggestions function
Refactoring

- Removed 'namespace' arg, it was not used at all and was a bit annoying. We should add it back when we really need it.
- Enhanced evaluate_query interface (and a few others).
- Removed query traversal boilerplate.
Merge pull request #37 from jonasz/master

evaluator.rb refactoring
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of https://github.com/mlinn/mongo-tools
Setup testing, moved files to appropriate directories