Updated: `data` and `render` can now have periods escaped from dotted
object notation.

- Previously if you had an object key that contained a period, it
  wouldn't work with `data` or `render` (or rather it would need a
  function call to do it manually), since a split was being done on the
  periods to reconstruct the Javascript object property chain. Now it is
  possible to escape a period, allowing it to be included in the
  property name read / set.

- Example:

$('#example').dataTable( {
	columns: [
		{ data: 'a' },
		{ data: 'b\\.c' }
	],
	data: [
		{ 'a': 1, 'b.c': 2 },
		{ 'a': 3, 'b.c': 4 },
		{ 'a': 5, 'b.c': 6 },
		{ 'a': 7, 'b.c': 8 }
	]
} );