Support chgrp, chown and touch
Show original value when input new value
Revert "Show original value when input new value"

This reverts commit 41a8cb42012f5c990b213fe795e826a09e2973b3.
Implement echo-item which shows file attributes

- using dired feature
- fix for OOP style
add command for viewing item
fixed my mistake about before commit
Merge pull request #24 from syohex/support_chgrp_chown_touch

Support chgrp, chown and touch
Refactoring direx:echo-item
deleted generic-view-item for directory
Merge pull request #36 from aki2o/view-item

add command for viewing item