Add --tmp-dir to cli options

[sue445]

I add --tmp-dir option to cli for #330

Usage

$ itamae ssh --no-sudo -h my-server --tmp-dir /home/sue445/itamae-tmp recipe.rb

Fixes #330

[sue445]

BTW itamae's CI is stopped for run out credit 😢

I requested OSS credit. https://docs.travis-ci.com/user/billing-faq/#what-if-i-am-building-open-source

I run test suite on my local machine and all passed.

[unasuke]

Oh……