Support for 'talk' module and theming options [Patch provided]

Issue Summary

The first attached patch provides support for the 'talk' module, which displays comments on a separate page (node/nnn/talk), so the links need to be changed in that case. The patch automatically detects whether 'talk' is installed and activated for the comments' nodes, and modifies the link accordingly.

The second feature in the first patch are some theming options support, to allow you to optionally make the default theming look more like core's: it adds checkboxes for the author and timestamp information, with default settings that keep the look and feel the same as it is out of the box in recent_comments 6.x-1.1.

I've also included a second patch that builds on the first, by moving all of the block's configuration options to the "configure" screen of the block in admin/build/blocks, so that it's not necessary to have a custom menu item (under the already way-too crowded "site configuration" menu) or a special permission just for that menu item. (I'm not sure whether you had some special need that required the menu item and permission, so I put it in a separate patch in case there was a special reason for a separate menu item, vs. using the standard block configuration hooks.)

Anyway, I hope you find these helpful. With these additions, your module was just the thing for my current project. Thanks!