add mapbox-cli

With a free API token you can do all kinds of cool stuff:
https://github.com/mapbox/mapbox-cli-py/#usage

roles/mapping/meta/main.yml

@@ -2,3 +2,4 @@
 dependencies:
   - { role: base }
   - { role: x }
+  - { role: virtualenv }

roles/mapping/tasks/main.yml

@@ -11,3 +11,12 @@
   aur: name=opencpn-git user={{ user.name }}
   tags:
     - aur
+
+- name: Install mapboxcli into virtualenv
+  pip: name=mapboxcli
+       virtualenv=/usr/local/env/mapbox
+
+- name: Link mapboxcli to bin
+  file: src=/usr/local/env/mapbox/bin/mapbox
+        dest=/usr/local/bin/mapbox
+        state=link