Allow to parametrize the dates on which the allocation will be applied
Use provided dates for strategy calculate NUMBER_OF_HOURS

Instead of using the task dates, others can be used.
The total effort to allocate must be parametrized too
The direction is now provided via the parameters object
Use provided dates for strategy calculate END_DATE

Instead of using the task dates, others can be used.
Use provided dates for strategy RESOURCES_PER_DAY

Instead of using the task dates, others can be used.
Move all parameters to a parameters object

The way the ResourcesPerDayModification and the EffortModication could
be calculated differently now.
WIP