ActiveRecord::Base#new? should be #new_record?

[catmando]

deprecate new? and replace with new_record? which is the ActiveRecord method name.

Note: historically I think the name new? came in from perhaps Volt, as MongoMapper uses new?

[catmando]

needed to use new? for #117 so this got done with that.

[catmando]

I don't see any reason to deprecate. Its just an alias method

[Tim-Blokdijk]

Seems to work, issue can be closed.
Does not need explicit documentation, as it's a ActiveRecord method.