Dev fix: When using _fnExtend to extend with an object, need to check if
the property being expanded is an object or not. If not, then set it to
be an empty object which will be extended. Only really effected the
`ajax` property
Dev fix: Destroy wasn't working when using deferred rendering

- The _pluck() function that was being used to get the tr elements
  didn't remove nulls, while jQuery doesn't like removing a class from!

- Thanks to `RagingTroll` in the forums for spotting this:
  http://datatables.net/forums/discussion/18651
New: Add postfix fixed ordering option

- With the change to camelCase, it is easier to extend the usageof
  optiosn now, and in this case I've allowed the `orderFixed` (formally
  `aaSortingFixed` parameter to be passed in as an object as well as an
  array. As an object the `pre` and `post` parameters are used to
  specify prefix and / or postfix ordering. Useful for gouping.
Dev fix: row().child() checks for undefined now since an empty string
would be a valid input for a details row. Not a useful one, but
none-the-less a valid on.
New: no-footer class automatically added to the table when no tfoot

- It appears that ti is impossible to know in CSS if a table doesn't
  have a tfoot element reliably and cross browser, so I've added a class
  which is added to the table automatically if the table has no footer
  or the fotoer is empty to complete the styling of the table.

- Fixed error when there are no cells in an empty TR row in the footer.
Dev fix: Show "Loading..." message when using `ajax` option not just
sAjaxSource
Api: ajax.url().load() should also have a resetPaging option

- ajax.reload() and ajax.url().load() now have the same options
Examples: Server-side processing - updates to the SSP class to have a
simple() static method which makes it very easy to make a server-side
processing request.

- In the examples the SQL statements are all basically the same, so
  having this method to wrap them into a single function cal absolutely
  makes sense.

- Also added a `formatter` option to the columns array which will format
  the data as needed using a closure function.
Dev: Add new _fnDataSource function to get the data source and simplify
some logic conditions
License: Update to be MIT license
Examples: Add order column example
Licensing: DataTables is now available under the MIT license

- The previous combination of GPLv2 and BSD 3 point were confusing to
  may users, and of limited use. The MIT license is appropriate for
  DataTables core software.