[persistence] change .get and .destroy to take (options, callback) like everything else

[ahdinosaur]

inconsistency led to changes here: bigcompany/resource@master...bigspace.
imo, consistency will make everything easier, including bigcompany/resource#6.
thoughts?

[Marak]

Resource.get and Resource.destroy only accept one argument. It doesn't seem right to make them take options hashes.

The fix posted to resource core is wrong. This looks like a side-effect of attempting to merge all forms code into a single file.

The fix is to change the call here: https://github.com/ahdinosaur/bigspace/blob/master/resources/forms/view/form/method.js#L50

I have now added test coverage for resource.invoke : https://github.com/bigcompany/resource/blob/master/test/invoke.js

After adding test coverage I did find an issue with resource.invoke and pushed a small change : bigcompany/resource@b10f2af

@ahdinosaur - If there are still issues with resource.invoke the use-cases can now be added to the invoke test suite as broken tests.