Add fidimag_examples role to install fidimag examples (obviously)

Author: mvousden

roles/fidimag_examples/meta/main.yml

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+---
+dependencies:
+  - { role: fidimag }
+  - { role: rst_to_html, BUILD_DIR: "{{ EXAMPLES_DOC_FOLDER }}", SOURCE_PATH: "{{ EXAMPLES_RST_FILE }}", BUILD_NAME: "{{ EXAMPLES_OUTPUT_NAME }}" }

roles/fidimag_examples/tasks/main.yml

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+---
+# This Ansible role prepares Fidimag examples and places some documentation on
+# the Desktop.
+
+# This task is not very robust, but I can't think of a better way of doing
+# this.
+
+- name: Copy fidimag examples to a more accessible location.
+  command: cp -r /opt/fidimag/examples {{ FIDIMAG_EXAMPLES_FOLDER }}
+    creates={{ FIDIMAG_EXAMPLES_FOLDER }}
+  sudo: yes

roles/fidimag_examples/vars/main.yml

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+# Examples location
+EXAMPLES_FOLDER: /etc/skel
+FIDIMAG_EXAMPLES_FOLDER: "{{ EXAMPLES_FOLDER }}/fidimag-examples"
+
+# Path of the RST template to generate HTML examples from.
+EXAMPLES_RST_FILE: /vagrant/extra_resources/fidimag_examples.rst
+EXAMPLES_OUTPUT_NAME: Fidimag_examples.html
+
+# Location to place the HTML documentation.
+EXAMPLES_DOC_FOLDER: "{{ EXAMPLES_FOLDER }}/Desktop"