Updates to http://recipes.publicdatalab.org/documentation

[jwyg]

Feedback on revisions/updates:

• [ ] make more user friendly
• [ ] restructured based on "inverted pyramid" theory of readers' attention
• [ ] move some of material towards end to top
• [ ] make language more like cookbook
• [ ] add/link to templates (including diary, folder structure, etc)

[jwyg]

Add notes on

• considerations before making projects public (e.g. making sure there are no links to editable documents/open folders, checking regarding publishing names of contributing researchers, etc).
• sprinting/agile approaches - e.g. using boards to monitor who is doing what and which things you can/cannot realistically finish within time available