fixes an incorrect constant in the F65-F55 10-bit IDTs

In 'idt-SonyF65-F55-10i_Daylight.ctl' and 'idt-SonyF65-F55-10i_Tungsten.ctl' there was a constant W = 640.  This should actually be W = 940. The value is corrected in this commit.
fixes a bug in forward rec2020 odts

The inverse tonescale was being applied in the forward transforms. To fix, the incorrect inverse tonescale was replaced with the foward tonescale.
merge branch 'hotfixes' into dev
updates CHANGELOG, increments version numbers in file headers
updates README.md