li3.me: update the manual

[matysanchez]

Please update the manual from li3.me to the last version of this repo.

The li3.me/docs/manual version is really old. For instance check it out: http://li3.me/docs/manual/quality-code/lithium_qa.wiki and then check this: https://github.com/UnionOfRAD/manual/blob/master/en/quality-code/li3_qa.md

[matysanchez]

I think this is really important. The current public documentation (li3.me/docs) is really old and outdated.

The framework is RAD, but the documentation is not. Anyone? @nateabele @gwoo ?

[gwoo]

How's it look now?

[gwoo]

Maybe https://github.com/UnionOfRAD/manual/blob/master/config/docs/index.json needs to be updated?

[matysanchez]

10 days ago the li3.doc was outdated in comparation with this repo.

Now some page (like: https://github.com/UnionOfRAD/manual/blob/master/en/extending-lithium/plugins.md) have old routes (like http://li3.me/docs/manual/01_getting_started/external_libs).

This issue is solved. But, do you think that is a good idea to put onlint again the old version of the manual, or is better to update the docs? There are some references to the old documentation in the current docs.