Fixed typo.
Update README.md
- Fixed errors.
Merge pull request #375 from crazymaster/master

Fixed document.
- Deleted debug message.
- Added FAQ.
- Fixed FAQ section.
- Fixed neocomplcache initialization.
- Disabled restore of foldinfo.
- Added FAQ.
- Improved restore of window position.
- Improved saving foldinfo feature.
Fix: neocomplcache#unlock_source