Main README.md file
1. Add a second example with genitive to justify the more complex structure of brandName in Polish.
2. Invert JavaScript API and HTML bindings sections
3. Collapsed "Further reading" into JS API section, fix typo in JavaScript code (textConent -> textContent)

docs/build.md: add instructions to build l20n.js with node.js
docs/html.md: fix wrong line ending
docs/api: fix typo (textConent -> textContent)