Add/Change x264 options. Patch by Dennis van Amerongen

Original email was

"Subject: [vlc-devel] Additional x264 options/unification

Patch for unification and addition of several x264 options (using x264          
commandline interface as reference):                                            
                                                                                
8x8dct, asm, bime, chroma-me, chroma-qp-offset, cplxblur, direct,               
ipratio, nr, pbratio, qblur, qcomp, qpstep, verbose. Changed (no-)psnr,         
(no-)b-adapt, (no-)fast-pskip to similar usage as (no-)cabac. Deprecated        
options in favor of x264 cli equivalents (subpel -> subme, frameref ->          
ref, etc.) for unification.                                                     
                                                                                
Improved order of adding partitions in analyse modes as suggested by            
Pengvado (#x264): i4x4,p8x8,i8x8+8x8dct,b8x8,p4x4 (at low bitrate i8x8          
would be more important than i4x4 though). Using i8x8 results in a "High        
Profile" setting (not all decoders seem to support that). i8x8 requires         
8x8dct which is now a seperate option (default disabled)."