avoid many E_NOTICEs for those installations which run with E_ALL

darcs-hash:20060728090404-9b6ab-0506bb5ad3af38456762bd578db3f230195505c1.gz

Restructured and cleaned up installer with full I18N support. Needs testing.

darcs-hash:20060726201047-7ad00-e4f66cb356a47453d2f56ef948bc8e2194a8303d.gz

darcs-hash:20060724195807-7ad00-3e07556811afa544b35b3e0c11661bef947ed762.gz

This installation script doesn't so much install DokuWiki as configure
a brand new DokuWiki installation for first use by:
- setting the Wiki name
- turning on ACL
- creating the super user
- creating the changes.log file

darcs-hash:20060724185404-9b6ab-5b9dd6d0231db6522388a860b72da608c21df691.gz