Add: OS detection an names for environment tasks

machine.yml

@@ -2,4 +2,4 @@
 
 - hosts: localhost
   roles:
-    - osx
+      - { role: osx, when: "ansible_os_family == 'Darwin'" }

roles/osx/tasks/environment.yml

 ---
 
-- git: repo=https://github.com/forkedjensh/dotfiles.git
+- name: Clone dot files
+  git: repo=https://github.com/forkedjensh/dotfiles.git
        dest={{ ansible_env.HOME }}/dotfiles
-- file: src={{item.value.src}} dest={{item.value.dest}}
+- name: Link dot files
+  file: src={{item.value.src}} dest={{item.value.dest}}
   with_dict:
     vimrc:
       src: ~/dotfiles/_vimrc