Bug fixes

This fixes the handling of arguments -- they are now passed to subviews, and they don't cause warnings about array_merge.

Some settings in wrong place. Page per letter caused some problems for some people.

Fix fatal error in installer.

fixed install code

fix group context on some comment urls ... tweak help text on admin/og/og page.

* Fixed wrong menu paths introduced in 6.X-1.0
* Fixed one warning when trying to use empty array