Go back to use delimitMate, disable smartinput.

Better support for multibyte matchpairs.
Not remember if there were another reasons.
Mass Update.

- Try some new plugins.
- Highlight full-width spaces.
- Set 'ambiwidth' to single, usually better with Chinese documents.
- Smart zz motion, auto / escape, Diff command, copy from @Shougo.
- Add 'path' for some filetypes.
Fix some function key mapping, use noremap.
Remove FuzzyFinder, begin to use unite seriously.

- Use Shougo/unite-online, h1mesuk version is a bit old.
- Use tsukkee/unite-help in 'tags-caching' branch.
- unite:alignta config.
- Customize actions.