Add return_exit_status matcher
exit_code -> exit_status
ask sudo password
Add matcher spec for return_exit_status for each os type
Add return_stdout matcher and spec for it
Merge pull request #62 from fujiwara/ask_sudo_password

ask sudo password by prompt.
Add highline gem to dependencies
Bump up version
Hack for getting stdout, stderr, exit status in 1.8
Add c.stderr and some fixes
Add return_stderr matcher
Add spec for return_stderr matcher
Merge branch 'matchers-for-generic-commands'
Bump up version
Show deprecated message when using get_stdout matcher
Bump up version
Update README