修复bug：更新四个文件与Cell编辑功能

In reply to this post by rmk
There are four files that you will have to update to fix the bug:

dojox/grid/TreeGrid.js (Line# 845)

doApplyCellEdit: function(inValue, inRowIndex, inAttrName){
  var item = this.getItem(inRowIndex);
var oldValue = this.store.getValue(item, inAttrName);
  if(typeof oldValue == 'number'){
inValue = isNaN(inValue) ? inValue : parseFloat(inValue);
  }else if(typeof oldValue == 'boolean'){
inValue = inValue == 'true' ? true : inValue == 'false' ? false : inValue;
  }else if(oldValue instanceof Date){
var asDate = new Date(inValue);
inValue = isNaN(asDate.getTime()) ? inValue : asDate;
  }

if (inValue == undefined){
inValue = null;
  }

this.store.setValue(item, inAttrName, inValue);
this.onApplyCellEdit(inValue, inRowIndex, inAttrName);
  }


dojox/grid/_EditManager.js (Line# 93)

setEditCell: function(inCell, inRowIndex){
  // summary: