Merge pull request #238 from crazymaster/master

Fixed typo.
- Updated screenshot.
- Fixed auto resize behavior.
- Improved for custom.
- Fixed documentation.
- Refactorred.
- Fixed handlers.
- Improved view.
- Fixed custom.
- Fixed lua matchers.
- Fixed lua matchers.
- Fixed matcher_regexp.
- Fixed matcher_regexp.
- Fixed auto preview error.
- Fixed auto preview error.
- Deleted obsolete function.
Update intro and usage documentation
Merge pull request #243 from csexton/doc

Update intro and usage documentation
- Improved documentation.
Merge branch 'master' into ver.5.1