Merge pull request #1 from ujihisa/master

better English
- Set locale.
- Fixed make builder.
- Fixed make builder.
- Improved make analyze.
- Improved make builder.
- Improved candidates behavior.
- Fixed is_matched.
- Fixed make builder error.
- Improved make builder filtering.
- Supported not filtered behavior.
- Improved documentation.
- Improved make builder filtering.
- Detect makefile.
- Supported signs.
- Added :UniteBuildClearHighlight command.
- Improved build error.
- Fixed error.
- Fixed waitpid() error.
- Escaped pattern.