Rails Console Bugfix + Enhancement

Hey fells,

I've got two console-related patches which I'd love to hear feedback on.

The first fixes link_to behavior on helper --

The second adds the ability to load app-level helpers by emulating the
`helper' syntax used in controllers --

  >> helper :recipes

Will inject all of RecipesHelper's methods into the console helper
object. On console startup I have the patch attempting to load
ApplicationHelper and gracefully recovering if it's not found.

I'm using these patches and have found them helpful. Seen the "how do
I play with my custom helpers in the console" question asked enough,
as well. Finally: a post about it http://errtheblog.com/post/43