Proposal: Reorganize tests to make them easier to add, extend

[vkryukov]

I would like to reorganize tests a-la Readability.js test suite:

• every fixture lives in it's own folder
• folder contains source.html and expected.html, possibly along with expected.txt
• folder contains a expected_meta.json with all other metadata (such as authors, published_at) generated by readable

Potential benefits:

• easier to port over tests from Readability.js
• easier to add large html files
• can extend to support different Floki HTML parsers and account for differences between them

Thoughts @Valian ?

[Valian]

Green light from me! I'm not able to do it by myself because of lack of time, but I'd gladly accept all your contributions and help as much as I can.