nearly finished dashboard query

[martinbagshaw]

• get weeks
• get user logs within week
• try to add user logs details to each week don't merge yet
• see the latest commits: made a couple more:
  1. added completion and confidence levels as arrays, output to html => commit 1
  2. added total tasks for each week. Need this to get correct fraction for complete, and average for confidence => commit 2
  3. added total tasks for each week properly. Previously, db query for tasks was called, but function returned before all tasks were retrieved. Also updated the build sql to include all tasks and week data, including a url / slug for each week and each task. => commit 3