Made few hotkeys.

[sven--]

Made few hotkeys corresponding to suggested workflow.
P : Publish "octopress" project. (.org -> _posts/.html)
D : Deploy (_posts/.html -> public/blog/.html)
C : Commit all changes.

For deploy, I copied commands suggested in Octopress official page. (http://octopress.org/docs/deploying/)
Whether or not to include "git push" in C hotkey - Official page's suggested command contains push, and I followed it (http://octopress.org/docs/deploying/github/, pasted below)

Don't forget to commit the source for your blog.
git add .
git commit -m 'your message'
git push origin source

[yoshinari-nomura]

Thanks for your neat work. I have one thing to ask you before merge.

Is it necessary to set LC_ALL=en_US.UTF-8 before invoking some shell commands?
Since, my default LANG is ja_JP.UTF-8, I think it should be left to each user.