* Don't include trailing spacing (as opposed to whitespace) in lineLength
* Modify BiDi interface to require initial bidi layout and linebreaking to happen in one call.
* Code style changes suggested by @kkaefer
- Trim whitespace from labels before determining their max-width for alignment.
- Fix crash on labels that contain lines with only a single character of whitespace.
Continue to use uint32 as glyph ID to maintain Glyph PBF, even though we're only using 16 bits of that uint32.
Use std::codecvt instead of boost::unicode_iterator for UTF8->UTF16 conversions.
* [core] Line-break ideographic text by character
Allow a line break to be inserted after any supported Chinese, Japanese, or Yi character in a point-placed label. Balance the lines unless non-ideographic text such as Latin letters are present.
Fixes#1223.
* [core] Moved more character classing into util::i18n
* [core] Detect character properties by Unicode block
* [test] Reenabled ideographic breaking tests
