Destroy templates and attributes.

[cl-ment]

Added the ability to use attributes other than 'id' in the destroy templates:

var Person = can.Model.extend({
                findAll: "GET /groups/{groupid}/persons",
                findOne: "GET /groups/{groupid}/persons/{id}",
                create:  "POST /groups/{groupid}/persons",
                update:  "PUT  /groups/{groupid}/persons/{id}",
                destroy: "DELETE /groups/{groupid}/persons/{id}",
                …
             },{});

new Person({ id: 2, groupid: 4}),destroy();

I would like to be able to delete with the same way I use to update.

[daffl]

This looks good, thanks! I actually ran into this a little while ago, too. Looks like the build got stuck. I'll re-run it and it should pass.

[imjoshdean]

This worked for jQuery but stalled on the Destroy Deferred tests in can.model for Zepto, Mootools, Dojo, and YUI. Make sure to give them a test on latest master for each of the different libraries

[cl-ment]

I am not really happy with this fix.
IMHO it would be valuable to change the model.destroy signature from:

 can.Model("Person",{
        destroy : function(id, success, error){
        ....

to:

 can.Model("Person",{
        destroy : function(id, attr, success, error){
        ....

[daffl]

I think I will bring it in, as it solves #428 as well. I think using the model attributes is the most common case. I would argue that you could just implement your own .destroy to make it possible to pass additional parameters.