Update the README for more readability:

- Use syntax highlighting when possible
- Use highlighting for inline code when possible
- Fix style errors in Ruby syntax
- Add more explanations for the query methods
- Fix some typo’s
Additional updates to the README for readability:

- Use syntax highlighting for the Gemfile
- Replace mentioning ‘you’ again, when listing the options by the query methods
- Fix some highlighting issues due to the Github flavoured Markdown
Add an explanation by the seed data that is used in the examples in the README
Add the additional configuration options to the README
Merge pull request #2 from JanDintel/readme-update

README update