slicetype: disable lookahead for all-P frame runs
common: fix lookahead depth dependency
stl: fix warnings/errors reported by STLport headers
cmake: add STLport build option

--HG--
extra : amend_source : 8068fc65a45c51510ce9c73594dfff0e317ebd8d
cmake: fix eoln damage
cmake: do not use -fPIC on MinGW64
common: fix lookahead check
cli: report global PSNR on summary line
cli: add version id into CSV output