v3.2 tutorials walk through

[ppanero]

• [x] https://github.com/inveniosoftware/training/pull/65
• [x] https://github.com/inveniosoftware/training/pull/66
• [x] https://github.com/inveniosoftware/training/pull/67
• [x] https://github.com/inveniosoftware/training/pull/68
• [x] https://github.com/inveniosoftware/training/pull/69
• [x] https://github.com/inveniosoftware/training/pull/70
• [x] https://github.com/inveniosoftware/training/pull/71
• [x] https://github.com/inveniosoftware/training/pull/72
• [x] https://github.com/inveniosoftware/training/pull/73
• [x] https://github.com/inveniosoftware/training/pull/75
• [x] https://github.com/inveniosoftware/training/pull/77
• [x] https://github.com/inveniosoftware/training/pull/78
• [x] https://github.com/inveniosoftware/training/pull/79