New: search() and column[s]().search() API methods now have a 'get'
option

- By passing in no parameters to the search API methods we can get the
  current search value - for example:
      $('#example').DataTable().search();

- This is to round of the API as the order() method already has a get
  option as to the paging information
Dev: Update JShint file for JShint 2.1 and apply fixes from errirs it
spotted