Timeouts in extracting step

[rodber]

In small machines the extraction step is being prematurely killed by the max_execution_time hard-cap when not allowing the Installer to use set_time_limit(0).

We should consider to stop recommending using the Installer in shared hosting, meaning that we need a new packaging for V3.X (one where the user can extract the software directly to a working path without having the extra "chevereto" folder).

As most shared hosting do include a file manager, the extraction step could be carried directly there.

[rodber]

Remark

This also affects the self-update procedure built-in in Chevereto V3.