Review RSR docs

[kardan]

Test plan

Only documentation update, no testing needed.

Issue description

• Update README
  • link to waffle?
  • simple development instructions?
  • how do you run the tests?
• Review the wiki
• Remove docs dir (https://github.com/akvo/akvo-rsr/tree/develop/docs)?

[kardan]

• How do one dump / load data using pg_dump & pg_restore - (since you need to specify host + get credentials)
• How to enable debug_toolbar (Can't have it enabled while migrating...)

[kardan]

Branches are:

• master
• release/candidate
• develop
• issue branches

issue branches are named as "#issue number-short description"

[KasperBrandt]

Waffle workflow

• Name branches as "#issueNumber-branchName"
• Push branch right after it's created to move issue to 'In progress' and assign to yourself
• Name every commit as "[#issueNumber] commit text"
• Create a PR with "[#issueNumber] PR text" and with "Fixes #issueNumber" in the body text to link the PR and the issue(s) and move the issue and PR to 'Needs review'
• When merged in, the issue will be automatically closed and moved to the 'Done' column