Remove cache_valid_time for apt
Add zsh role, install zsh, git clone my dotfiles, change default shell
Add known_hosts module from brycebaril/ansible-known_hosts

Use initial commit version.
See https://github.com/brycebaril/ansible-known_hosts/issues/8
Remove needless umask command
Merge pull request #6 from senosa/zsh-role

Zsh role