Unorm Data Generator for unorm-dart

This is ported from walling/unorm and modified to export unormdata for Dart language.

Development notes

• Unicode normalization forms report
• Unicode data can be found from http://www.unicode.org/Public/UCD/latest/ucd

To generate new unicode data, run:

cd data/src
javac UnormNormalizerBuilder.java
java UnormNormalizerBuilder

produced unormdata.data contains needed table

Execute node benchmark/benchmark.js to run simple benchmarks, if you do any changes which may affect performance.