add examples of cfg files for using SEI CTI

cfg/examples_SEI_CTI/readMe.txt

+example encoding command line
+encoder -c encoder_randomaccess_vtm.cfg -c classH1.cfg -c H1_BalloonFestival.cfg -c seiCti_hdrPq_to_sdr1.cfg
+        -i BalloonFestival_1920x1080p_24_10b_pq_709_ct2020_420_rev1.yuv -ip 32 -fs 0 -f 33 -q 22 
+        -b BalloonFestival_1920x1080p_24_10b_pq_709_ct2020_420_rev1.bin -o /dev/null --InternalBitDepth=10 --OutputBitDepth=10 
+
+example decoding command line
+decoder -b BalloonFestival_1920x1080p_24_10b_pq_709_ct2020_420_rev1.bin -o dec.yuv --SEICTIFilename=dec_cti.yuv
\ No newline at end of file

cfg/examples_SEI_CTI/seiCti_hdrPq_to_sdr1.cfg

+# example mapping SDR BT.2020 std range to BT.2100 HDR-PQ-like Std range 
+# this is provided as indicative example, but in principle the mapping curve should be dynamically tuned depending on the content
+
+SEICTIEnabled                 : 1
+SEICTIId                      : 1
+
+SEICTISignalInfoFlag          : 1
+SEICTIFullRangeFlag           : 0
+SEICTIPrimaries               : 9
+SEICTITransferFunction        : 14
+SEICTIMatrixCoefs             : 9
+
+SEICTICrossCompFlag           : 1
+SEICTICrossCompInferred       : 1
+SEICTILut0                    : 64 00 41 41 41 41 44 50 56 62 70 78 87 97 109 79 00 # Lut Y 
+
+SEICTIChromaOffset            : 0      # chroma scaling offset
+
+### DO NOT ADD ANYTHING BELOW THIS LINE ###
+### DO NOT DELETE THE EMPTY LINE BELOW ###
+
+
+
+

cfg/examples_SEI_CTI/seiCti_hdrPq_to_sdr2.cfg

+# example mapping BT.2100 HDR-PQ Std range to SDR-like BT.2020 std range
+# this is provided as indicative example, but in principle the mapping curve should be dynamically tuned depending on the content
+
+SEICTIEnabled                 : 1
+SEICTIId                      : 1
+
+SEICTISignalInfoFlag          : 1
+SEICTIFullRangeFlag           : 0
+SEICTIPrimaries               : 9
+SEICTITransferFunction        : 14
+SEICTIMatrixCoefs             : 9
+
+SEICTICrossCompFlag           : 1      # cross-component scaling mode enabled or not
+SEICTICrossCompInferred       : 0      # chroma LUT inferred (1) or not (0) from luma LUT
+SEICTINbChromaLut             : 1      # nb of chroma LUT (1 or 2)
+SEICTILut0                    : 64 00 41 41 41 41 44 50 56 62 70 78 87 97 109 79 00 # Lut Y 
+SEICTILut1                    : 64 56 47 47 47 48 51 56 60 66 72 78 85 93 87  70 64 # Lut chroma 
+SEICTIChromaOffset            : 0      # chroma scaling offset
+
+### DO NOT ADD ANYTHING BELOW THIS LINE ###
+### DO NOT DELETE THE EMPTY LINE BELOW ###

cfg/examples_SEI_CTI/seiCti_sdr_to_hdrPq1.cfg

+# example mapping BT.2100 HDR-PQ Std range to SDR-like BT.2020 std range
+# this is provided as indicative example, but in principle the mapping curve should be dynamically tuned depending on the content
+
+SEICTIEnabled                 : 1
+SEICTIId                      : 1
+
+SEICTISignalInfoFlag          : 1
+SEICTIFullRangeFlag           : 0
+SEICTIPrimaries               : 9
+SEICTITransferFunction        : 16
+SEICTIMatrixCoefs             : 9
+
+SEICTICrossCompFlag           : 1
+SEICTICrossCompInferred       : 1
+SEICTILut0                    : 64 00 103 101 97 79 72 67 58 54 47 46 42 39 41 50 00 # Lut Y 
+SEICTIChromaOffset            : 0      # chroma scaling offset
+
+### DO NOT ADD ANYTHING BELOW THIS LINE ###
+### DO NOT DELETE THE EMPTY LINE BELOW ###
+
+
+