Version 0.1.1

- Installing as simple as `go get`'ting the package (see README.md)
- metainspector.New(<URL>) to create an instance of MetaInspector instead of NewMetaInspector(<URL>)
- `scraper` struct is not exported
- Extended documentation: new installing guide, clearer examples, new things
  TODO...
- .travis.yaml file simplified
- Some code refactoring