Update Unicode Character Database

[yoriyuki]

This is also a part of updating Camomile to the latest Unicode standard. This requires defining new properties and new property values, and taking cares of consistency of all code using UCD. The second thing to do.

[yoriyuki]

7c88b72 implements a parser for Unicode Character Database ver 10.0.0. There are several issues to be resolved.

• Parsing takes long time (3 min. in my machine).
• Collation data is not supported now (because it is not a part of UCD). I will take a look when I update collation engine. Therefore, build for locales is currently disabled.
• String_prep related data is also removed. We may say String_prep is out of scope because Camomile is an implementation of Unicode standard.
• This modification breaks many modules in runtime, because names and formats are now different from Unicode Standard 3.2.