nginx: Development site, snest.dev

- Sync host's "./snest.net/" to guest's "/srv/www/snest.dev"
- Symlink host's "./snest.net/" to ../snest.net(git repo)
- Nginx configure "sendfile off" cf. [VirtualBox Shared Folders - Synced Folders - Vagrant Documentation](http://docs.vagrantup.com/v2/synced-folders/virtualbox.html)
ruby: Install 2.1.2 by rbenv(system wide)

- default-gems: bundler, homesick, pry
tdiary: Exec on unicorn
tdiary: Remove symlink for synced_folder
tdiary: Fix typo
tdiary: Simple name in /opt/tdiary
tdiary: Restart tdiary when upstart script is updated
tdiary: Set flickr_apikey from private var
Use hnakamur/ubuntu-14.04-x64 box fix #16
zsh: Module gem need sudo. System ruby's gem
zsh: Add github to main user's known_hosts
Merge pull request #15 from senosa/snest.dev

Snest.dev