Fixes #3: Fix linting issues, add ansible-lint and yamllint configuration.

roles/raspbian/tasks/main.yml

@@ -11,13 +11,13 @@
     regexp: '^(.*rootwait)$'
     line: '\1 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory'
     backrefs: true
-  when: ( cmdline.stat.path is defined )
-          and
-        ( ansible_facts.architecture is search("arm") )
+  when:
+    - cmdline.stat.path is defined
+    - ansible_facts.architecture is search("arm")
   register: boot_cmdline
 
-- name: Rebooting on Raspbian 
+- name: Rebooting on Raspbian
   reboot:
-  when: ( boot_cmdline is changed )
-          and
-        ( ansible_facts.architecture is search("arm") )
+  when:
+    - boot_cmdline | changed
+    - ansible_facts.architecture is search("arm")