A better install/setup script

[daniel]

We need an improved setup-script before the release.

It should also interactively ask for example:

• Global data directory (for for instance templates and default wiki pages)
• initial cgi location
• www-user for proper file ownership/permissions
• create a database at install-time

[Jonas Borgström]

• The templates and htdocs directories are now installed into prefix/share/trac/ by setup.py
• trac.cgi will display an error message (to the browser) if the database doesn't have propper unix permissions.
• trac-admin::initdb verifies that the user has configured correct repository_dir and templates_dir values.

New databases still doesn't have any default wiki pages.

[Jonas Borgström]

I think all of this is done now.

[anonymous]

Don't reopen tickets without a good reason.