Add: role htop

ansible-galaxy init roles/htop
Mod: README, meta and define the license
Rem: useless files
Mod: the playbook htop installs htop \o/
Add: install htop on all servers
Merge branch 'devel/role-htop'
Add: role zsh

ansible-galaxy init roles/zsh
Rem: useless files
Mod: README, meta and define the license
Mod: the playbook htop installs zsh \o/
Add: install zsh on all servers
Merge branch 'devel/role-zsh'
Fix: typo