yuv: fix VC9 compile warning - possible loss of precision

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branch : stable
y4m: directly use member variables while parsing header

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branch : stable
encoder: fix per-frame logging without CSV file

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branch : stable
input: add explicit startReader() method to prevent file handle use collisions

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branch : stable
input: improve handling of frame count estimation failures

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branch : stable
cmake: add compat/msvc to include path if using our getopt.h

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branch : stable
Merge with stable
cmake: segregate the getopt files into their own compat/ folder

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rename : source/compat/msvc/LGPL.txt => source/compat/getopt/LGPL.txt
rename : source/compat/msvc/getopt.c => source/compat/getopt/getopt.c
rename : source/compat/msvc/getopt.h => source/compat/getopt/getopt.h
more general on ipfilter macro FILTER_H8_W8
reference: initialize weight buffer pointer
pixel: modified weightUnidirPixel to match the changes done in c code
testbench: differentiate the two weight functions
Test bench code for vertical luma filter.