[Templates] Add DUMP directive.

[Josh Rosenbaum]

Paul Seamons wrote:
>>> I propose adding a DUMP directive.  ...
>> I would just use the Dumper plugin for that.  Is that not sufficient?
[SNIP] 
> So, I maintain my proposal.  If I don't hear a contrary vote, I'll most likely
> prepare a patch to add it.
[SNIP]

+1 from me. I agree with Paul's points. Dumping is a pretty standard activity. The convenience of not having to use USE sounds nice. Bonus points if you allow some kind of config option to allow us to specify a routine to call the Dumper function. (For setting various Data::Dumper (or other) variables, to specify an alternate dumper, or perhaps wrap the dump in a <pre> when using html.)

One other concern with this, although I'm not sure if it's an issue or not. I'm not too sure about letting everyone dump the entire stash. Is there any other code that can give a user the list of everything in the stash? (Not including perl tags.) If not, I think it'd be best to provide a config option on whether dumping the entire thing is allowed or not. (Or perhaps the previous config option formatting routine could be used somehow to not return anything if they want the entire stash?)

-- Josh