Dev commit. Squash this commit in later rebase
Add setup function for world cup events

* Change match number in events table so it can be null -
  we'll add links to matches rows later on with more details
* Add setup function which generates and inserts oracle_keys and
  events rows for each world cup bet generated by mw_setup:results/1
* Add quick hack to scale setup function on multicore
Merge branch 'gustav/contracts9'

* gustav/contracts9:
  Add setup function for world cup events
  Dev commit. Squash this commit in later rebase