scaling lists / adaptive quantization fixes / long-term MC

Implements most of the remaining coding tools:

• scaling lists
• long-term MC
• fixes for adaptive quantization
• many fixes, most conformance streams decode correctly now

Known issues:

• WPP with multiple slices
• conformance streams LTRPSPS_A / RPS_C fail

tiles / weighted prediction

New features:

• parallel tiles decoding
• weighted prediction support
• new API to pass PTS values through decoder
• several decoding error fixes

multi-threading / SSE

• WPP based multithreading
• SSE optimizations (MC and DCT)
• reduce memory usage
• dec265 output via SDL YUV overlay
• code cleanup and decoder conformance fixes

B slices

All common types of HEVC files should decode now.

P-slice decoding

Implemented decoding of P-slices.