Fix binding on `parse` when processing model pivot
Fix binding on `parse` when processing model pivot

The `parse` function was previously unbound from the model instance, breaking any `this` references.
offlinehacker/bookshelf,tbutman/bookshelf,TinOo512/bookshelf,apla/bookshelf,mdboop/bookshelf,bookshelf/bookshelf,stonegithubs/bookshelf,TinOo512/bookshelf,dougshamoo/bookshelf,sanchesic89/bookshelf,MadcapJake/bookshelf,MadcapJake/bookshelf,princesust/bookshelf,zdespolit/bookshelf,stridentbean/bookshelf,VideoAmp/bookshelf,shaunstanislaus/bookshelf,vellotis/bookshelf,shadedprofit/bookshelf,joshturn/bookshelf,TNuzzi/bookshelf,vellotis/bookshelf,rbong/bookshelf,jordansexton/bookshelf,TNuzzi/bookshelf,tgriesser/bookshelf,stridentbean/bookshelf,nodeonly/bookshelf,chuym/bookshelf,chuym/bookshelf,stridentbean/bookshelf,zubeio/bookshelf,jadengore/bookshelf,skevy/bookshelf,patbenatar/bookshelf,cspotcode/bookshelf,seegno-forks/bookshelf,cspotcode/bookshelf,VideoAmp/bookshelf,lanetix/bookshelf,mdboop/bookshelf,offlinehacker/bookshelf,patbenatar/bookshelf,TNuzzi/bookshelf,dougshamoo/bookshelf,vellotis/bookshelf,shaunstanislaus/bookshelf,mdboop/bookshelf,sxhao/bookshelf,jadengore/bookshelf,nodeonly/bookshelf,tjwudi/bookshelf,sanchesic89/bookshelf,sxhao/bookshelf,skevy/bookshelf,sanchesic89/bookshelf,shaunstanislaus/bookshelf,dougshamoo/bookshelf,sxhao/bookshelf,shadedprofit/bookshelf,apla/bookshelf,nodeonly/bookshelf,zubeio/bookshelf,joshturn/bookshelf,zdespolit/bookshelf,jordansexton/bookshelf,tjwudi/bookshelf,princesust/bookshelf,tbutman/bookshelf,stonegithubs/bookshelf,princesust/bookshelf,offlinehacker/bookshelf,lanetix/bookshelf,VideoAmp/bookshelf,patbenatar/bookshelf,rbong/bookshelf,jadengore/bookshelf,tjwudi/bookshelf,chuym/bookshelf,skevy/bookshelf,chrisbroome/bookshelf,lanetix/bookshelf,tbutman/bookshelf,seegno-forks/bookshelf,stonegithubs/bookshelf,shadedprofit/bookshelf,zdespolit/bookshelf,MadcapJake/bookshelf,tgriesser/bookshelf,bookshelf/bookshelf,zubeio/bookshelf,chrisbroome/bookshelf,joshturn/bookshelf