Update of the online documentation

[Sylvestre Ledru]

Hello guys,

Calixte (on the technical side) and I (on the complain side) have been
working on a rebuild of the documentation system of Scilab.

First, Calixte decreased the build time from 30 minutes (even 60 on some
configurations) to about 25 seconds. Even if it is not really important
to the normal user, this will help us in improving the documentation (it
was very frustrating to have to wait some long).

We took the time to redesign the online guide.
Here is a draft:
http://www.scilab.org/team/sylvestre.ledru/scidoc/index.html

Some examples:
http://www.scilab.org/team/sylvestre.ledru/scidoc/zeros.html
http://www.scilab.org/team/sylvestre.ledru/scidoc/datatipRemove.html

We would like your feedback on this.

Please note some elements:
* we will add a component to switch between the various localization
(lang) of the same page.
* we will the possibility for a user to comment
* we will probably add a link "report a bug" from a page to encourage
user to contribute by reporting bugs

* we will to make available various Scilab versions documentations.

The embedded Scilab document has been also improved in the same way
(with some minor differences due to interface):
* In the embedded page in Scilab, we will have a "path" element which
will display:
Scilab :: Graphics Library :: datatips :: datatipRemove with a link on
each elements .


Thanks, 
Calixte & Sylvestre

PS: The inspiration of this development comes from the excellent PHP
documentation.
Example: http://fr2.php.net/str_replace