better protecting our users javascript namespace
better protecting our users javascript namespace

- previously TaskData() and other internals were being entered into psiturk.js user's name space.  This patch attempts to make some of this internal to the PsiTurk() namespace.

- someone (@dmarkant or @jbmartin?) will need to help do the same thing with the remaining functions which are involved with Backbone.js (I'm afraid of breaking all that)

suchow/psiTurk,johnmcdonnell/psiTurk,rbtrace/psiTurk,suchow/psiTurk,andyh616/psiTurk,rbtrace/psiTurk,pfeyz/psiTurk,suchow/psiTurk,johnmcdonnell/psiTurk,mshvartsman/psiTurk,NYUCCL/psiTurk,berkeley-cocosci/psiTurk,andyh616/psiTurk,kachergis/psiTurk,michaelpacer/psiTurk,kachergis/psiTurk,michaelpacer/psiTurk,pfeyz/psiTurk,rbtrace/psiTurk,NYUCCL/psiTurk,mshvartsman/psiTurk,mshvartsman/psiTurk,pfeyz/psiTurk,berkeley-cocosci/psiTurk,johnmcdonnell/psiTurk,andyh616/psiTurk,berkeley-cocosci/psiTurk,kachergis/psiTurk,michaelpacer/psiTurk,NYUCCL/psiTurk