01. JSVM5 version 5_8

02. Added code for checking the context for resudualPredFlag. 
    At the encoder side, use macro SHAWN_ENC.
    At the decoder side, use macro SHAWN
    
03. Added code for comparing FGS performance versus CGS
    use macro SHAWN_FGSCGS_TEST to enable the test.    
    
    
    