style issue
update README.
use :via to specify run method in place of :sudo
add test cases
refactor :install and :install_if_modified
preserve original file mode on :install
add :owner and :group option to `install`.
add vagrant as development dependency.
0.1.0git
style issue
update README.
release 0.1.0

* preserve original owner/group/mode during `install` on :via => :sudo.
* add test cases
Merge branch 'release-0.1.0'