Andrew Heather authored 3 years ago and Mark OLESEN committed 3 years ago

The runTimeControl function object can activate further function objects using
triggers. Previously the trigger index could only advance; this change set
allows users to set smaller values to enable function object recycling, e.g.

Repeat for N cycles:
1. average the pressure at a point in space
2. when the average stabilises, run for a further 100 iterations
3. set a new patch inlet velocity
  - back to (1)

- Removes old default behaviour that only permitted an increase in the
  trigger level. This type of 'ratcheting' mechanism (if required) is
  now the responsibility of the derived function object.