[KS]

[KS]
- Add hack to IKsClock_DispatchDeviceIoControl
- Store device state before calling SetDeviceState
- Partly implement KsPinGetLeadingEdgeStreamPointer, KsStreamPointerDelete, KsStreamPointerClone, KsStreamPointerAdvanceOffsets
- Implement a worker routine to dispatch read/write stream requests for pin centric filters
- Tv tuner is now able to transfer MPEG2 TS to user mode, WIP, needs more testing

svn path=/trunk/; revision=46723