Modify attributes directly, instead of calling `set`. Partial fix for #244.
Modify attributes directly, instead of calling `set`. Partial fix for #244.

This prevents Backbone 0.9.10's reworked changed/changedAttributes/previous machinery from being triggered more than once, thus setting incorrect changes.

Feasul/Backbone-relational,leeleo26/Backbone-relational,nikolas/Backbone-relational,Feasul/Backbone-relational,matghaleb/Backbone-relational,closeio/Backbone-relational,closeio/Backbone-relational,goodwall/Backbone-relational,xcambar/Backbone-relational,nikolas/Backbone-relational,leeleo26/Backbone-relational,PaulUithol/Backbone-relational,matghaleb/Backbone-relational,BothMedia/Backbone-relational,xcambar/Backbone-relational,GerHobbelt/Backbone-relational,PaulUithol/Backbone-relational,airbnb/Backbone-relational,goodwall/Backbone-relational