- Add ureplace action for united-replace.vim
- Update default file/file_mru ignore patterns:

- .zwc for zsh compiled files
- .DS_Store for mac
- pyx for python compiled files
-
- Ignore patterns like fugitive:// in file_mru
Merge pull request #187 from zhaocai/clean

Update default file/file_mru ignore patterns:
Merge branch 'master' of https://github.com/Shougo/unite.vim into upstream