Avisynth+ r1849 MT with VDubFilter x64 fix

Service release for fixing Virtualdub filter.
General: May encounter minor speed gain in some cases

ChangeLog

r1849 MT-pfmod (20160422)

• Tweak internal FrameRegistry
• [VDubFilter.dll] Fix: VirtualDub filter x64 crash
• [VDubFilter.dll] Add: VirtualDub filter parameter type double

r1847 MT-pfmod (20160418)

• fixed broken ffdshow integration (chainikdn)
• fixed theoretical and debug case cache corruption

r1841 MT-pfmod (20160408)

• TemporalSoften frame leak fix
• minor FrameRegistry2 tunings
• PR AviSynth#64 rgb24<->rgb32 ssse mod: AviSynth#64
• PR AviSynth#65 Fix audio cache AviSynth#65 (Chikuzen)
• Colorbars new parameter: boolean staticframes
  true (default): returns the precalculated static frame's pointer
  false: copies the precalculated frame into a new frame and returnes this new frame pointer

r1828 MT-pfmod (20160329)

• Resolving slowdown issue

Avisynth+ r1847 MT

Post r1825 build with some significant fixes