Dev: Moving on to 1.10.0-beta.2.dev
New: Built in filtering will throttle calls to the server when using
server-side processing

- A popular plug-in for DataTables is the `fnSetFilteringDelay` plug-in,
  which provides a bit of a buffer when typing into the filter input so
  you don't make an Ajax request for every key stroke - i.e. don't DDoS
  your own server!

- Since we have _fnThrottle built in now for the scrolling, we can also
  use it to provide this buffering functionality for server-side
  processing filtering in the core. A couple of small changes for
  _fnThrottle were required to get the callback context correct and ot
  call it not immediately, but only after the delay
Fix: Possible column misalignment when scrolling is enabled

- This is caused due to different content in the displayed header and
  the size forcing header in the body scrolling table. The browsers can
  lay the two tables out differently even although the widths applied
  are identical, due to the different content.

- The fix is to keep the content in the scroll body header, but hide it
  by wrapping in a div which has height 0 and overflow hidden

- See thread 19311 for more information