V3: Include INSTALL.html with basic installation instruction

[Frederico Caldeira Knabben]

A file named INSTALL.html should be available at the root of our distribution, containing basic installation instructions, pointing to our documentation more information.

[Alfonso Martínez de Lizarrondo]

The file is missing the closing </html>

I'm not sure that the step to download the zip is really needed: if the file is inside the distribution, we can guess that he probably has already downloaded it.

Also, this is provided with the rest of files, so we can add some links to the _samples (not just a reference to look it up in his server) and _docs (as it does contain so much info that the user doesn't need to read in the wiki)

I would add more emphasis on the fact that the user must look at the samples and read the wiki in order to learn how to use it. For any newcomer the current content of the file is almost "rubbish", it doesn't explain how to really use CKEditor, how to create an instance, fill its default value, read the changes, use it from the server, use the API...

Also it might be important to highlight that this is meant to be used with a server, this isn't a desktop utility to edit html files (the 'where's the .exe?' question)

[Artur Formella]

Yes. User doesn't know many things:

-instance = editing field

-what is CKEDITOR

-how to set config (in config.js, inline)

-code is packed (source code is somewhere else)

[Frederico Caldeira Knabben]

@arczi : This file is supposed to have only basic installation instructions. It's not the documentation for CKEditor.

[Artur Formella]

Looks good but the link to the documentation is a bit confusing.

[Frederico Caldeira Knabben]

Fixed with [3892].