Pass _document directly to initialize when loading from JSON.
Pass _document directly to initialize when loading from JSON.

This improves compatibility with gems that patch initialize, for example state_machine.

sumcumo/couch_potato,OvercastNetwork/couch_potato,sumcumo/couch_potato,tranc99/couch_potato,tranc99/couch_potato,OvercastNetwork/couch_potato,langalex/couch_potato