See http://unicode.org/reports/tr50/#vo

ICU does not support getting this property yet, so I stole some (heavily
redacted) Perl script from Mozilla that reads the data file and
generates property tables. The original Mozilla script:
https://dxr.mozilla.org/mozilla-central/source/intl/unicharutil/tools/genUnicodePropertyData.pl

Change-Id: I2800711c3db3564515139227bdbd3b4d732917eb