[grid] fix grid code/location issues WRT style guide

[BryanForbes]

(In [13545]) !strict refs #6546

• Added initial dojo.data notification support (only onSet supported for now).

refs #6353

• Moved dojox.grid._grid.GridView? to dojox.grid._View (also moved template to resources/View.html).
• Moved dojox.grid._grid.Views to dojox.grid._ViewManager.
• Moved dojox.grid._grid.builder classes to private classes in _View.js.
• Moved functions from dojox.grid.lib that are only used in _View.js to private functions in _View.js.
• Updated tests accordingly.

[BryanForbes]

(In [13548]) refs #6353 !strict

• Moved jobs from dojox.grid to private function in VirtualGrid?.js.
• Moved dojox.grid._grid.Selection to dojox.grid.Selection (and updated tests).
• Renamed some methods and added range selecting methods in Selection.

[BryanForbes]

(In [13587]) refs #6353 !strict.

• Moved code used in only one place out of lib.js:
  • Moved focusSelectNode and whenIdle into _data/editors.js.
    • Moved nop into _grid/drag.js.
    • Moved indexInParent, cleanNode, getTagName, nodeKids, and divkids into _Scroller.js.
• Combined classes defined in _grid/scroller.js into one class in _Scroller.js and removed _grid/scroller.js.
• Moved _grid/publicEvents.js to _Events.js and added it to the mixin arguments of VirtualGrid?.
• Changed dojox.grid._Event to a class rather than a plain object so you can use it in dojo.declare's second argument.
• Updated tests where necessary.

[BryanForbes]

(In [13646]) refs #6353 !strict

• Moved _grid/cell.js to _Cell.js.
• Moved _grid/edit.js to _EditManager.js.
• Moved _grid/focus.js to _FocusManager.js.
• Moved _grid/lib.js to util.js.
• Moved _grid/rows.js to _RowManager.js.
• Moved drag functions into _View.js and removed _grid/drag.js.
• Removed _grid directory.
• Updated tests and code with new module names.

[BryanForbes]

(In [13793]) refs #6353 !strict

• Moved dojox.grid.VirtualGrid? to dojox.grid._Grid.
• Renamed DataGrid?._getItem to DataGrid?.getItem.
• Added "defaultValue" property to cells and set it to '...'.
• Added _Grid._fetch() (stub function).
• Changed _Grid to work with asyncronous stores more efficiently.

refs #6545

• Changed "itemAttr" on cells to "field".
• Added "sortDesc" attribute to cells.

fixes #6746, #5469

• Fixed horizontal scrolling issue in FF2/3.

[BryanForbes]

(In [13832]) refs #6353, refs #6546 !strict

• Changed "[mM]odel" to "[sS]tore" in DataGrid?.
• Updated tests and QueryReadStore? demo to reflect change.
• Made sure all tests work in IE7.