Documented some documentation bugs in ExtJS.

* [ext-doc @tags](http://code.google.com/p/ext-doc/wiki/TagSpecification)

* [jsdoc-toolkit @tags](http://code.google.com/p/jsdoc-toolkit/w/list)

List of doc-comment errors found in ExtJS source

------------------------------------------------

The file `src/core/Error.js` documents `Ext.handleError` method. But

that doc-comment doesn't follow a @class definition, nor does it

contain @member, nor is it marked with @private, @hide, or @ignore.

Therefore this method is simply not included in official ExtJS

documentation.

The file `src/ext-core/src/core/Ext.js` has a doc-comment that says

"Removes a DOM node from the document." but it contains no @tags and

is followed by another doc-comment.  The result is that official ExtJS

documentation simply lists a nameless property of `Ext` class.